diff --git a/filter/f-inst.c b/filter/f-inst.c
index e3e0d76d..51a35350 100644
--- a/filter/f-inst.c
+++ b/filter/f-inst.c
@@ -924,7 +924,7 @@
     SYMBOL;
 
     FID_SAME_BODY()
-      if (!(f2->sym->flags & SYM_FLAG_SAME))
+      if (!(f1->sym->flags & SYM_FLAG_SAME))
 	return 0;
     FID_INTERPRET_BODY()