diff --git a/winpr/libwinpr/utils/collections/HashTable.c b/winpr/libwinpr/utils/collections/HashTable.c
index 7782b2bf0..8bbaf8400 100644
--- a/winpr/libwinpr/utils/collections/HashTable.c
+++ b/winpr/libwinpr/utils/collections/HashTable.c
@@ -561,7 +561,8 @@ size_t HashTable_GetKeys(wHashTable* table, ULONG_PTR** ppKeys)
 
 	iKey = 0;
 	count = table->numOfElements;
-	*ppKeys = NULL;
+	if (ppKeys)
+		*ppKeys = NULL;
 
 	if (count < 1)
 	{