1 files changed, 3 insertions, 1 deletions
diff --git a/array.c b/array.c
index 4ca1dc3c2d..9bfd24041e 100644
--- a/array.c
+++ b/array.c
@@ -910,7 +910,9 @@ rb_inspecting_p(obj)
 {
     VALUE inspect_tbl;
 
-    if (!inspect_key) return Qfalse;
+    if (!inspect_key) {
+	inspect_key = rb_intern("__inspect_key__");
+    }
     inspect_tbl = rb_thread_local_aref(rb_thread_current(), inspect_key);
     if (NIL_P(inspect_tbl)) return Qfalse;
     return rb_ary_includes(inspect_tbl, rb_obj_id(obj));