diff --git a/basis/alien/marshall/marshall.factor b/basis/alien/marshall/marshall.factor
index 098a0e9127..ef96f86d98 100644
--- a/basis/alien/marshall/marshall.factor
+++ b/basis/alien/marshall/marshall.factor
@@ -259,4 +259,4 @@ M: struct-wrapper dynamic-cast ;
         [ const-type? not ]
         [ factorize-type pointer-to-primitive? ]
     } 1&&
-    [ primitive-unmarshaller ] [ drop [ drop ] ] if ;
+    [ factorize-type primitive-unmarshaller ] [ drop [ drop ] ] if ;