diff --git a/src/cmd/6g/gen.c b/src/cmd/6g/gen.c
index 7925c5352a4..3da034e2494 100644
--- a/src/cmd/6g/gen.c
+++ b/src/cmd/6g/gen.c
@@ -553,7 +553,7 @@ argsize(Type *t)
 		x = fp->width + fp->type->width;
 		if(x > w)
 			w = x;
-		fp = structnext(&save);
+		fp = funcnext(&save);
 	}
 
 	w = (w+7) & ~7;