1 files changed, 1 insertions, 1 deletions
diff --git a/FL/x.H b/FL/x.H
index 1c23ee520..2049d5bd3 100644
--- a/FL/x.H
+++ b/FL/x.H
@@ -30,7 +30,7 @@
 // need to call Xlib directly.  These symbols may not exist on non-X
 // systems.
 
-#ifndef Fl_X_H
+#if !defined(Fl_X_H) && !defined(FL_DOXYGEN) 
 #  define Fl_X_H
 
 #  include "Enumerations.H"