diff --git a/common/pch/app-pch.h b/common/pch/app-pch.h
index 6c1f216aa..aa2244f13 100644
--- a/common/pch/app-pch.h
+++ b/common/pch/app-pch.h
@@ -1,3 +1,5 @@
+#pragma once
+
 #include "../types.h"
 #include "../database.h"
 #include "../strings.h"