diff --git a/server/gameserver/metamgr.cc b/server/gameserver/metamgr.cc
index c84430c..3e31dd4 100755
--- a/server/gameserver/metamgr.cc
+++ b/server/gameserver/metamgr.cc
@@ -207,7 +207,7 @@ public:
                     std::vector<std::string> tmpstrings;
                     a8::Split(MetaMgr::Instance()->level0room_spec_things, tmpstrings, ':');
                     for (auto& str : tmpstrings) {
-                        if (!!str.empty()) {
+                        if (!str.empty()) {
                             MetaMgr::Instance()->level0room_spec_things_set.insert
                                 (
                                  a8::XValue(str).GetInt()