diff --git a/src/tests/apps/installer/CopyEngine.h b/src/tests/apps/installer/CopyEngine.h
index 61b31024df..7cd7671f13 100644
--- a/src/tests/apps/installer/CopyEngine.h
+++ b/src/tests/apps/installer/CopyEngine.h
@@ -6,8 +6,11 @@
 #ifndef _CopyEngine_h
 #define _CopyEngine_h
 
+#include <Directory.h>
 #include <Looper.h>
+#include <Menu.h>
 #include <Messenger.h>
+#include <Path.h>
 
 class InstallerWindow;