diff --git a/Source/include/FreeRTOS.h b/Source/include/FreeRTOS.h
index 2216767fb..d7609f365 100644
--- a/Source/include/FreeRTOS.h
+++ b/Source/include/FreeRTOS.h
@@ -409,7 +409,7 @@ typedef portBASE_TYPE (*pdTASK_HOOK_CODE)( void * );
 #endif
 
 #ifndef pvPortMallocAligned
-	#define pvPortMallocAligned( xSize, pvBuffer ) pvPortMalloc( xSize ); ( void ) pvBuffer
+	#define pvPortMallocAligned( x, puxStackBuffer ) ( ( puxStackBuffer == NULL ) ? ( pvPortMalloc( x ) ) : ( puxStackBuffer ) )
 #endif
 
 #ifndef vPortFreeAligned
diff --git a/Source/tasks.c b/Source/tasks.c
index 75816f393..3ca53b104 100644
--- a/Source/tasks.c
+++ b/Source/tasks.c
@@ -72,8 +72,6 @@ task.h is included from an application file. */
  */
 #define tskIDLE_STACK_SIZE	configMINIMAL_STACK_SIZE
 
-#define tskIDLE_PRIORITY			( ( unsigned portBASE_TYPE ) 0 )
-
 /*
  * Task control block.  A task control block (TCB) is allocated to each task,
  * and stores the context of the task.