diff --git a/src/game/AchievementMgr.h b/src/game/AchievementMgr.h
index 19dc31c64e3..9b41cd7588c 100644
--- a/src/game/AchievementMgr.h
+++ b/src/game/AchievementMgr.h
@@ -169,6 +169,6 @@ class AchievementGlobalMgr
         AchievementRewardLocales m_achievementRewardLocales;
 };
 
-#define achievementmgr MaNGOS::Singleton<AchievementGlobalMgr>::Instance()
+#define achievementmgr Trinity::Singleton<AchievementGlobalMgr>::Instance()
 
 #endif