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-rw-r--r--src/Fl_Overlay_Window.cxx1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/Fl_Overlay_Window.cxx b/src/Fl_Overlay_Window.cxx
index 4a7195889..464ed1fb3 100644
--- a/src/Fl_Overlay_Window.cxx
+++ b/src/Fl_Overlay_Window.cxx
@@ -87,6 +87,7 @@ void Fl_Overlay_Window::redraw_overlay() {
}
#else
+#include <FL/x.H>
extern XVisualInfo *fl_find_overlay_visual();
extern XVisualInfo *fl_overlay_visual;