diff --git a/ChangeLog b/ChangeLog
index f76e30d715..5ce9b1e82c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Mon Oct 28 07:47:32 2013  Aman Gupta <ruby@tmm1.net>
+
+	* vm_backtrace.c (rb_profile_frame_classpath): do not use rb_inspect
+	  directly, since it might have a custom implementation or show ivars.
+
 Mon Oct 28 04:10:41 2013  Aman Gupta <ruby@tmm1.net>
 
 	* vm_backtrace.c (rb_profile_frame_classpath): handle singleton
diff --git a/vm_backtrace.c b/vm_backtrace.c
index 279a94e49c..541eda35cd 100644
--- a/vm_backtrace.c
+++ b/vm_backtrace.c
@@ -1298,7 +1298,7 @@ rb_profile_frame_classpath(VALUE frame)
 	else if (FL_TEST(klass, FL_SINGLETON)) {
 	    klass = rb_ivar_get(klass, id__attached__);
 	    if (!RB_TYPE_P(klass, T_CLASS))
-		return rb_inspect(klass);
+		return rb_sprintf("#<%s:%p>", rb_class2name(rb_obj_class(klass)), (void*)klass);
 	}
 	return rb_class_path(klass);
     }