diff --git a/include/projdefs.h b/include/projdefs.h
index c68b4b841..c1adfad23 100644
--- a/include/projdefs.h
+++ b/include/projdefs.h
@@ -37,7 +37,7 @@ typedef void (* TaskFunction_t)( void * );
  * overridden by a macro of the same name defined in FreeRTOSConfig.h in case the
  * definition here is not suitable for your application. */
 #ifndef pdMS_TO_TICKS
-    #define pdMS_TO_TICKS( xTimeInMs )    ( ( TickType_t ) ( ( ( TickType_t ) ( xTimeInMs ) * ( TickType_t ) configTICK_RATE_HZ ) / ( TickType_t ) 1000 ) )
+    #define pdMS_TO_TICKS( xTimeInMs )    ( ( TickType_t ) ( ( ( TickType_t ) ( xTimeInMs ) * ( TickType_t ) configTICK_RATE_HZ ) / ( TickType_t ) 1000U ) )
 #endif
 
 #define pdFALSE                                  ( ( BaseType_t ) 0 )