diff --git a/common/utils/T/tracer/gui/gui.h b/common/utils/T/tracer/gui/gui.h
index b1321c1e49..a26f9a77e2 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 165785923c..c1f8d33d89 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;