diff --git a/list.c b/list.c
index 0c0f3676e..bdea0f6ee 100644
--- a/list.c
+++ b/list.c
@@ -216,6 +216,7 @@ void vListInsert( List_t * const pxList,
 
 UBaseType_t uxListRemove( ListItem_t * const pxItemToRemove )
 {
+    configASSERT( pxItemToRemove->pxContainer != NULL );
     /* The list item knows which list it is in.  Obtain the list from the list
      * item. */
     List_t * const pxList = pxItemToRemove->pxContainer;