diff --git a/queue.c b/queue.c
index e91d9e39b..fe06368d3 100644
--- a/queue.c
+++ b/queue.c
@@ -833,6 +833,10 @@ static void prvInitialiseNewQueue( const UBaseType_t uxQueueLength,
         if( pxMutex->u.xSemaphore.xMutexHolder == xTaskGetCurrentTaskHandle() )
         {
             ( pxMutex->u.xSemaphore.uxRecursiveCallCount )++;
+
+            /* Check if an overflow occurred. */
+            configASSERT( pxMutex->u.xSemaphore.uxRecursiveCallCount );
+
             xReturn = pdPASS;
         }
         else
@@ -845,6 +849,9 @@ static void prvInitialiseNewQueue( const UBaseType_t uxQueueLength,
             if( xReturn != pdFAIL )
             {
                 ( pxMutex->u.xSemaphore.uxRecursiveCallCount )++;
+
+                /* Check if an overflow occurred. */
+                configASSERT( pxMutex->u.xSemaphore.uxRecursiveCallCount );
             }
             else
             {