diff --git a/Demo/CORTEX_AT91SAM3U256_IAR/printf-stdarg.c b/Demo/CORTEX_AT91SAM3U256_IAR/printf-stdarg.c
index f6139dc80..b5ac41be7 100644
--- a/Demo/CORTEX_AT91SAM3U256_IAR/printf-stdarg.c
+++ b/Demo/CORTEX_AT91SAM3U256_IAR/printf-stdarg.c
@@ -101,7 +101,7 @@ static int printi(char **out, int i, int b, int sg, int width, int pad, int letb
 	*s = '\0';
 
 	while (u) {
-		t = (int)u % b;
+		t = (unsigned int)u % b;
 		if( t >= 10 )
 			t += letbase - '0' - 10;
 		*--s = (char)(t + '0');
diff --git a/Demo/CORTEX_LPC1766_GCC_RedSuite/printf-stdarg.c b/Demo/CORTEX_LPC1766_GCC_RedSuite/printf-stdarg.c
index f6139dc80..b5ac41be7 100644
--- a/Demo/CORTEX_LPC1766_GCC_RedSuite/printf-stdarg.c
+++ b/Demo/CORTEX_LPC1766_GCC_RedSuite/printf-stdarg.c
@@ -101,7 +101,7 @@ static int printi(char **out, int i, int b, int sg, int width, int pad, int letb
 	*s = '\0';
 
 	while (u) {
-		t = (int)u % b;
+		t = (unsigned int)u % b;
 		if( t >= 10 )
 			t += letbase - '0' - 10;
 		*--s = (char)(t + '0');
diff --git a/Demo/CORTEX_STM32F107_GCC_Rowley/printf-stdarg.c b/Demo/CORTEX_STM32F107_GCC_Rowley/printf-stdarg.c
index f6139dc80..b5ac41be7 100644
--- a/Demo/CORTEX_STM32F107_GCC_Rowley/printf-stdarg.c
+++ b/Demo/CORTEX_STM32F107_GCC_Rowley/printf-stdarg.c
@@ -101,7 +101,7 @@ static int printi(char **out, int i, int b, int sg, int width, int pad, int letb
 	*s = '\0';
 
 	while (u) {
-		t = (int)u % b;
+		t = (unsigned int)u % b;
 		if( t >= 10 )
 			t += letbase - '0' - 10;
 		*--s = (char)(t + '0');
diff --git a/Demo/ColdFire_MCF51CN128_CodeWarrior/Sources/printf-stdarg.c b/Demo/ColdFire_MCF51CN128_CodeWarrior/Sources/printf-stdarg.c
index f6139dc80..b5ac41be7 100644
--- a/Demo/ColdFire_MCF51CN128_CodeWarrior/Sources/printf-stdarg.c
+++ b/Demo/ColdFire_MCF51CN128_CodeWarrior/Sources/printf-stdarg.c
@@ -101,7 +101,7 @@ static int printi(char **out, int i, int b, int sg, int width, int pad, int letb
 	*s = '\0';
 
 	while (u) {
-		t = (int)u % b;
+		t = (unsigned int)u % b;
 		if( t >= 10 )
 			t += letbase - '0' - 10;
 		*--s = (char)(t + '0');
diff --git a/Demo/ColdFire_MCF52221_CodeWarrior/sources/printf-stdarg.c b/Demo/ColdFire_MCF52221_CodeWarrior/sources/printf-stdarg.c
index f6139dc80..b5ac41be7 100644
--- a/Demo/ColdFire_MCF52221_CodeWarrior/sources/printf-stdarg.c
+++ b/Demo/ColdFire_MCF52221_CodeWarrior/sources/printf-stdarg.c
@@ -101,7 +101,7 @@ static int printi(char **out, int i, int b, int sg, int width, int pad, int letb
 	*s = '\0';
 
 	while (u) {
-		t = (int)u % b;
+		t = (unsigned int)u % b;
 		if( t >= 10 )
 			t += letbase - '0' - 10;
 		*--s = (char)(t + '0');
diff --git a/Demo/ColdFire_MCF52233_Eclipse/RTOSDemo/printf-stdarg.c b/Demo/ColdFire_MCF52233_Eclipse/RTOSDemo/printf-stdarg.c
index f6139dc80..b5ac41be7 100644
--- a/Demo/ColdFire_MCF52233_Eclipse/RTOSDemo/printf-stdarg.c
+++ b/Demo/ColdFire_MCF52233_Eclipse/RTOSDemo/printf-stdarg.c
@@ -101,7 +101,7 @@ static int printi(char **out, int i, int b, int sg, int width, int pad, int letb
 	*s = '\0';
 
 	while (u) {
-		t = (int)u % b;
+		t = (unsigned int)u % b;
 		if( t >= 10 )
 			t += letbase - '0' - 10;
 		*--s = (char)(t + '0');
diff --git a/Demo/ColdFire_MCF52259_CodeWarrior/printf-stdarg.c b/Demo/ColdFire_MCF52259_CodeWarrior/printf-stdarg.c
index f6139dc80..b5ac41be7 100644
--- a/Demo/ColdFire_MCF52259_CodeWarrior/printf-stdarg.c
+++ b/Demo/ColdFire_MCF52259_CodeWarrior/printf-stdarg.c
@@ -101,7 +101,7 @@ static int printi(char **out, int i, int b, int sg, int width, int pad, int letb
 	*s = '\0';
 
 	while (u) {
-		t = (int)u % b;
+		t = (unsigned int)u % b;
 		if( t >= 10 )
 			t += letbase - '0' - 10;
 		*--s = (char)(t + '0');