diff --git a/src/lua.rs b/src/lua.rs
index c14d364..de86ac8 100644
--- a/src/lua.rs
+++ b/src/lua.rs
@@ -1080,6 +1080,8 @@ impl<'lua, 'scope> Scope<'lua, 'scope> {
                     ffi::LUA_REGISTRYINDEX,
                     registry_id as ffi::lua_Integer,
                 );
+                ffi::luaL_unref(state, ffi::LUA_REGISTRYINDEX, registry_id);
+
                 ffi::lua_getupvalue(state, -1, 1);
                 let ud = take_userdata::<RefCell<Callback>>(state);
 
@@ -1109,6 +1111,7 @@ impl<'lua, 'scope> Scope<'lua, 'scope> {
                     ffi::LUA_REGISTRYINDEX,
                     registry_id as ffi::lua_Integer,
                 );
+                ffi::luaL_unref(state, ffi::LUA_REGISTRYINDEX, registry_id);
                 Box::new(take_userdata::<RefCell<T>>(state))
             }));
             Ok(u)
diff --git a/src/tests.rs b/src/tests.rs
index f8ce37a..cd661f4 100644
--- a/src/tests.rs
+++ b/src/tests.rs
@@ -614,6 +614,7 @@ fn scope_func() {
             .unwrap();
         lua.globals().set("bad", f.clone()).unwrap();
         f.call::<_, ()>(()).unwrap();
+        assert_eq!(Rc::strong_count(&rc), 2);
     });
     assert_eq!(rc.get(), 42);
     assert_eq!(Rc::strong_count(&rc), 1);