diff --git a/source/ps/ModInstaller.h b/source/ps/ModInstaller.h
index 8538fbb0c0..c061db812d 100644
--- a/source/ps/ModInstaller.h
+++ b/source/ps/ModInstaller.h
@@ -18,6 +18,7 @@
 #ifndef INCLUDED_MODINSTALLER
 #define INCLUDED_MODINSTALLER
 
+#include "CStr.h"
 #include "lib/file/vfs/vfs.h"
 #include "scriptinterface/ScriptInterface.h"