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-rw-r--r--src/Fl_Window.cxx1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/Fl_Window.cxx b/src/Fl_Window.cxx
index ef9669973..ae7024533 100644
--- a/src/Fl_Window.cxx
+++ b/src/Fl_Window.cxx
@@ -21,6 +21,7 @@
// crap you need to do to communicate with X is in Fl_x.cxx, the
// equivalent (but totally different) crap for MSWindows is in Fl_win32.cxx
#include <FL/Fl.H>
+#include <FL/x.H>
#include <FL/Fl_Window_Driver.H>
#include <FL/Fl_RGB_Image.H>
#include <FL/Fl_Window.H>