diff --git a/hash.c b/hash.c
index 34f2b93cecb406..60fad036c2a73b 100644
--- a/hash.c
+++ b/hash.c
@@ -3294,6 +3294,7 @@ rb_hash_transform_keys_bang(int argc, VALUE *argv, VALUE hash)
             rb_hash_aset(new_keys, new_key, Qnil);
         }
         rb_ary_clear(pairs);
+        rb_gc_force_recycle(pairs);
         rb_hash_clear(new_keys);
         rb_gc_force_recycle(new_keys);
     }