1 files changed, 2 insertions, 1 deletions
diff --git a/ext/objspace/objspace.c b/ext/objspace/objspace.c
index a9b1e64183..262640d30c 100644
--- a/ext/objspace/objspace.c
+++ b/ext/objspace/objspace.c
@@ -141,7 +141,8 @@ setup_hash(int argc, VALUE *argv)
         hash = rb_hash_new();
     }
     else if (!RHASH_EMPTY_P(hash)) {
-        st_foreach(RHASH_TBL(hash), set_zero_i, hash);
+        /* WB: no new reference */
+        st_foreach(RHASH_TBL_RAW(hash), set_zero_i, hash);
     }
 
     return hash;