diff --git a/src/server/game/Conditions/ConditionMgr.h b/src/server/game/Conditions/ConditionMgr.h
index 42bf4dde268..207c311731e 100644
--- a/src/server/game/Conditions/ConditionMgr.h
+++ b/src/server/game/Conditions/ConditionMgr.h
@@ -21,6 +21,7 @@
 #include "Define.h"
 #include "Hash.h"
 #include <array>
+#include <string>
 #include <unordered_map>
 #include <vector>