1 files changed, 5 insertions, 1 deletions
diff --git a/hash.c b/hash.c
index 000c39e178..b4b0415c84 100644
--- a/hash.c
+++ b/hash.c
@@ -272,7 +272,11 @@ rb_objid_hash(st_index_t index)
 static st_index_t
 objid_hash(VALUE obj)
 {
-    return (st_index_t)st_index_hash((st_index_t)obj);
+#if SIZEOF_LONG == SIZEOF_VOIDP
+    return (st_index_t)st_index_hash((st_index_t)NUM2LONG(rb_obj_id(obj)));
+#elif SIZEOF_LONG_LONG == SIZEOF_VOIDP
+    return (st_index_t)st_index_hash((st_index_t)NUM2LL(rb_obj_id(obj)));
+#endif
 }
 
 VALUE