diff --git a/src/clear_cmd.cpp b/src/clear_cmd.cpp
--- a/src/clear_cmd.cpp
+++ b/src/clear_cmd.cpp
@@ -17,6 +17,7 @@
 #include "functions.h"
 #include "economy_func.h"
 #include "viewport_func.h"
+#include "settings_type.h"
 
 #include "table/strings.h"
 #include "table/sprites.h"