diff --git a/FreeRTOS/Source/tasks.c b/FreeRTOS/Source/tasks.c
index 6bdf13c4f..0dcb621b1 100644
--- a/FreeRTOS/Source/tasks.c
+++ b/FreeRTOS/Source/tasks.c
@@ -1606,6 +1606,9 @@ implementations require configUSE_TICKLESS_IDLE to be set to a value other than
 
 	void vTaskStepTick( portTickType xTicksToJump )
 	{
+		/* Correct the tick count value after a period during which the tick
+		was suppressed.  Note this does *not* call the tick hook function for
+		each stepped tick. */
 		configASSERT( ( xTickCount + xTicksToJump ) <= xNextTaskUnblockTime );
 		xTickCount += xTicksToJump;
 	}