diff --git a/src/misc_gui.cpp b/src/misc_gui.cpp
--- a/src/misc_gui.cpp
+++ b/src/misc_gui.cpp
@@ -12,6 +12,7 @@
 #include "stdafx.h"
 #include "debug.h"
 #include "landscape.h"
+#include "error.h"
 #include "gui.h"
 #include "viewport_func.h"
 #include "gfx_func.h"