diff --git a/src/signs_gui.cpp b/src/signs_gui.cpp
--- a/src/signs_gui.cpp
+++ b/src/signs_gui.cpp
@@ -7,8 +7,8 @@
 #include "gui.h"
 #include "textbuf_gui.h"
 #include "window_gui.h"
-#include "player_gui.h"
-#include "player_func.h"
+#include "company_gui.h"
+#include "company_func.h"
 #include "signs_base.h"
 #include "signs_func.h"
 #include "debug.h"