diff --git a/cockatrice/src/interface/widgets/server/user/user_list_manager.h b/cockatrice/src/interface/widgets/server/user/user_list_manager.h
index 4b0f5dae3..56f50c0be 100644
--- a/cockatrice/src/interface/widgets/server/user/user_list_manager.h
+++ b/cockatrice/src/interface/widgets/server/user/user_list_manager.h
@@ -9,6 +9,7 @@
 
 #include "user_list_proxy.h"
 
+#include <QMap>
 #include <QWidget>
 #include <libcockatrice/protocol/pb/serverinfo_user.pb.h>