diff --git a/portable/GCC/AVR32_UC3/portmacro.h b/portable/GCC/AVR32_UC3/portmacro.h
index 5bc7c8b08..ebf501091 100644
--- a/portable/GCC/AVR32_UC3/portmacro.h
+++ b/portable/GCC/AVR32_UC3/portmacro.h
@@ -116,7 +116,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/CORTUS_APS3/portmacro.h b/portable/GCC/CORTUS_APS3/portmacro.h
index 37e739bb5..9d2d0e0cd 100644
--- a/portable/GCC/CORTUS_APS3/portmacro.h
+++ b/portable/GCC/CORTUS_APS3/portmacro.h
@@ -65,7 +65,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/ColdFire_V2/portmacro.h b/portable/GCC/ColdFire_V2/portmacro.h
index 14d318b7b..06ddbd887 100644
--- a/portable/GCC/ColdFire_V2/portmacro.h
+++ b/portable/GCC/ColdFire_V2/portmacro.h
@@ -63,7 +63,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/H8S2329/portmacro.h b/portable/GCC/H8S2329/portmacro.h
index 829ff9f9b..a5612cadf 100644
--- a/portable/GCC/H8S2329/portmacro.h
+++ b/portable/GCC/H8S2329/portmacro.h
@@ -64,7 +64,7 @@ typedef unsigned char UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/HCS12/portmacro.h b/portable/GCC/HCS12/portmacro.h
index a86441989..a11b96c37 100644
--- a/portable/GCC/HCS12/portmacro.h
+++ b/portable/GCC/HCS12/portmacro.h
@@ -65,7 +65,7 @@ typedef unsigned char UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/MSP430F449/portmacro.h b/portable/GCC/MSP430F449/portmacro.h
index 5a6e1db9c..2f70a24d1 100644
--- a/portable/GCC/MSP430F449/portmacro.h
+++ b/portable/GCC/MSP430F449/portmacro.h
@@ -63,7 +63,7 @@ typedef unsigned short UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/PPC405_Xilinx/portmacro.h b/portable/GCC/PPC405_Xilinx/portmacro.h
index e6f1c06c8..06cca5df9 100644
--- a/portable/GCC/PPC405_Xilinx/portmacro.h
+++ b/portable/GCC/PPC405_Xilinx/portmacro.h
@@ -65,7 +65,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/PPC440_Xilinx/portmacro.h b/portable/GCC/PPC440_Xilinx/portmacro.h
index e6f1c06c8..06cca5df9 100644
--- a/portable/GCC/PPC440_Xilinx/portmacro.h
+++ b/portable/GCC/PPC440_Xilinx/portmacro.h
@@ -65,7 +65,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/RL78/portmacro.h b/portable/GCC/RL78/portmacro.h
index 8108f1c12..349402008 100644
--- a/portable/GCC/RL78/portmacro.h
+++ b/portable/GCC/RL78/portmacro.h
@@ -59,7 +59,7 @@ typedef unsigned short UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/GCC/STR75x/portmacro.h b/portable/GCC/STR75x/portmacro.h
index 8d5e832c5..876783dcb 100644
--- a/portable/GCC/STR75x/portmacro.h
+++ b/portable/GCC/STR75x/portmacro.h
@@ -64,7 +64,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/78K0R/portmacro.h b/portable/IAR/78K0R/portmacro.h
index 4ccc083c0..03bb5dee7 100644
--- a/portable/IAR/78K0R/portmacro.h
+++ b/portable/IAR/78K0R/portmacro.h
@@ -64,7 +64,7 @@ typedef unsigned short UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/ATMega323/portmacro.h b/portable/IAR/ATMega323/portmacro.h
index 69ba2f1d9..cbc7b2d15 100644
--- a/portable/IAR/ATMega323/portmacro.h
+++ b/portable/IAR/ATMega323/portmacro.h
@@ -71,7 +71,7 @@ typedef unsigned char UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/AVR32_UC3/portmacro.h b/portable/IAR/AVR32_UC3/portmacro.h
index 73c206ca5..98aa5be07 100644
--- a/portable/IAR/AVR32_UC3/portmacro.h
+++ b/portable/IAR/AVR32_UC3/portmacro.h
@@ -119,7 +119,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/AVR_AVRDx/portmacro.h b/portable/IAR/AVR_AVRDx/portmacro.h
index 5b4b5be8b..cb3cb7ec2 100644
--- a/portable/IAR/AVR_AVRDx/portmacro.h
+++ b/portable/IAR/AVR_AVRDx/portmacro.h
@@ -65,7 +65,7 @@ typedef unsigned char    UBaseType_t;
     #define portMAX_DELAY    ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/AVR_Mega0/portmacro.h b/portable/IAR/AVR_Mega0/portmacro.h
index 5b4b5be8b..cb3cb7ec2 100644
--- a/portable/IAR/AVR_Mega0/portmacro.h
+++ b/portable/IAR/AVR_Mega0/portmacro.h
@@ -65,7 +65,7 @@ typedef unsigned char    UBaseType_t;
     #define portMAX_DELAY    ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/AtmelSAM7S64/portmacro.h b/portable/IAR/AtmelSAM7S64/portmacro.h
index 01c6eed6a..9bcf8a670 100644
--- a/portable/IAR/AtmelSAM7S64/portmacro.h
+++ b/portable/IAR/AtmelSAM7S64/portmacro.h
@@ -64,7 +64,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/AtmelSAM9XE/portmacro.h b/portable/IAR/AtmelSAM9XE/portmacro.h
index db6f10cca..fdc7c2ba6 100644
--- a/portable/IAR/AtmelSAM9XE/portmacro.h
+++ b/portable/IAR/AtmelSAM9XE/portmacro.h
@@ -67,7 +67,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/LPC2000/portmacro.h b/portable/IAR/LPC2000/portmacro.h
index 8fdf1fe75..2929ecba5 100644
--- a/portable/IAR/LPC2000/portmacro.h
+++ b/portable/IAR/LPC2000/portmacro.h
@@ -67,7 +67,7 @@ typedef unsigned long UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/MSP430/portmacro.h b/portable/IAR/MSP430/portmacro.h
index 298307f55..6dcec2f03 100644
--- a/portable/IAR/MSP430/portmacro.h
+++ b/portable/IAR/MSP430/portmacro.h
@@ -58,7 +58,7 @@ typedef unsigned short UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/MSP430X/portmacro.h b/portable/IAR/MSP430X/portmacro.h
index 1ab4665b9..72456cf11 100644
--- a/portable/IAR/MSP430X/portmacro.h
+++ b/portable/IAR/MSP430X/portmacro.h
@@ -67,7 +67,7 @@ typedef unsigned short UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/IAR/RL78/portmacro.h b/portable/IAR/RL78/portmacro.h
index 9685b569d..1cfe85fa6 100644
--- a/portable/IAR/RL78/portmacro.h
+++ b/portable/IAR/RL78/portmacro.h
@@ -82,7 +82,7 @@ typedef unsigned short UBaseType_t;
     #define portMAX_DELAY ( TickType_t ) 0xffff
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif
diff --git a/portable/WizC/PIC18/portmacro.h b/portable/WizC/PIC18/portmacro.h
index ad70560e4..0fdba688e 100644
--- a/portable/WizC/PIC18/portmacro.h
+++ b/portable/WizC/PIC18/portmacro.h
@@ -63,7 +63,7 @@ typedef unsigned char UBaseType_t;
     #define portMAX_DELAY ( TickType_t )    ( 0xFFFF )
 #elif ( configTICK_TYPE_WIDTH_IN_BITS == TICK_TYPE_WIDTH_32_BITS )
     typedef uint32_t TickType_t;
-    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFF )
+    #define portMAX_DELAY ( TickType_t )    ( 0xFFFFFFFFUL )
 #else
     #error configTICK_TYPE_WIDTH_IN_BITS set to unsupported tick type width.
 #endif