diff --git a/src/openrct2/windows/error.c b/src/openrct2/windows/error.c
index 82e637884a..d23a9d0314 100644
--- a/src/openrct2/windows/error.c
+++ b/src/openrct2/windows/error.c
@@ -19,6 +19,7 @@
 #include "../interface/widget.h"
 #include "../interface/window.h"
 #include "../localisation/localisation.h"
+#include "../OpenRCT2.h"
 #include "../platform/platform.h"
 #include "../rct2.h"
 #include "error.h"