diff --git a/common/utils/T/tracer/gui/gui.h b/common/utils/T/tracer/gui/gui.h
index b1321c1e495dccb30b5bc0e90496da9355988fd9..a26f9a77e232700b193f4a87a943e894812261d8 100644
--- a/common/utils/T/tracer/gui/gui.h
+++ b/common/utils/T/tracer/gui/gui.h
@@ -9,6 +9,9 @@ typedef void widget;
 #define HORIZONTAL 0
 #define VERTICAL   1
 
+#define BACKGROUND_COLOR 0
+#define FOREGROUND_COLOR 1
+
 gui *gui_init(void);
 
 /* position = -1 to put at the end */
diff --git a/common/utils/T/tracer/gui/x.h b/common/utils/T/tracer/gui/x.h
index 165785923cf369aaaeb02c58d9b426148f0a6fb4..c1f8d33d89e8831c8a1882ecbf737763c02191fb 100644
--- a/common/utils/T/tracer/gui/x.h
+++ b/common/utils/T/tracer/gui/x.h
@@ -3,9 +3,6 @@
 
 /* public X interface */
 
-#define BACKGROUND_COLOR 0
-#define FOREGROUND_COLOR 1
-
 typedef void x_connection;
 typedef void x_window;