diff --git a/Source/Core/DolphinQt2/GameList/ListProxyModel.h b/Source/Core/DolphinQt2/GameList/ListProxyModel.h
index 85213baf46..235c4bd7af 100644
--- a/Source/Core/DolphinQt2/GameList/ListProxyModel.h
+++ b/Source/Core/DolphinQt2/GameList/ListProxyModel.h
@@ -2,6 +2,8 @@
 // Licensed under GPLv2+
 // Refer to the license.txt file included.
 
+#pragma once
+
 #include <QSortFilterProxyModel>
 
 // This subclass of QSortFilterProxyModel transforms the raw data into a