diff --git a/ttd.c b/ttd.c
--- a/ttd.c
+++ b/ttd.c
@@ -1112,6 +1112,8 @@ static void DoAutosave(void)
 		ShowErrorMessage(INVALID_STRING_ID, STR_AUTOSAVE_FAILED, 0, 0);
 }
 
+extern void HandleKeyScrolling(void);
+
 void GameLoop(void)
 {
 	int m;
@@ -1123,6 +1125,9 @@ void GameLoop(void)
 		RedrawAutosave();
 	}
 
+	// handle scrolling of the main window
+	if (_dirkeys) HandleKeyScrolling();
+
 	// make a screenshot?
 	if ((m=_make_screenshot) != 0) {
 		_make_screenshot = 0;