diff --git a/filter/f-inst.c b/filter/f-inst.c
index 49ae993a..385d18d0 100644
--- a/filter/f-inst.c
+++ b/filter/f-inst.c
@@ -897,6 +897,11 @@
     NEVER_CONSTANT;
     SYMBOL;
 
+    FID_SAME_BODY()
+      if (!(f2->sym->flags & SYM_FLAG_SAME))
+	return 0;
+    FID_INTERPRET_BODY()
+
     /* Push the body on stack */
     LINEX(sym->function);
     curline.emask |= FE_RETURN;