diff --git a/Modules/collectionsmodule.c b/Modules/collectionsmodule.c
index a0570cd..a4cdcfa 100644
--- a/Modules/collectionsmodule.c
+++ b/Modules/collectionsmodule.c
@@ -95,7 +95,7 @@
 	dequeobject *deque;
 	block *b;
 
-	if (!_PyArg_NoKeywords("deque()", kwds))
+	if (type == &deque_type && !_PyArg_NoKeywords("deque()", kwds))
 		return NULL;
 
 	/* create dequeobject structure */