1 files changed, 1 insertions, 1 deletions
diff --git a/eval.c b/eval.c
index da53f6121b..c2e163452e 100644
--- a/eval.c
+++ b/eval.c
@@ -6546,7 +6546,7 @@ rb_obj_instance_eval(int argc, VALUE *argv, VALUE self)
 {
     VALUE klass;
 
-    if (FIXNUM_P(self) || SYMBOL_P(self)) {
+    if (SPECIAL_CONST_P(self)) {
 	klass = Qnil;
     }
     else {