diff --git a/src/server/enums/connection_status.hpp b/src/server/enums/connection_status.hpp
index c9b77d0..e2fe145 100644
--- a/src/server/enums/connection_status.hpp
+++ b/src/server/enums/connection_status.hpp
@@ -1,3 +1,4 @@
+#pragma once
 
 namespace big
 {