diff --git a/src/cmd/gc/subr.c b/src/cmd/gc/subr.c
index 325614e6bc..081c373a88 100644
--- a/src/cmd/gc/subr.c
+++ b/src/cmd/gc/subr.c
@@ -3808,7 +3808,7 @@ isdirectiface(Type *t)
 	// where the data word can hold a pointer or any
 	// non-pointer value no bigger than a pointer.
 	enum {
-		IfacePointerOnly = 0,
+		IfacePointerOnly = 1,
 	};
 
 	if(IfacePointerOnly) {