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-rw-r--r--src/Fl_x.cxx1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/Fl_x.cxx b/src/Fl_x.cxx
index 51570d9f5..913c7200d 100644
--- a/src/Fl_x.cxx
+++ b/src/Fl_x.cxx
@@ -51,6 +51,7 @@
# include <X11/Xmd.h>
# include <X11/Xlocale.h>
# include <X11/Xlib.h>
+# include <X11/keysym.h>
static Fl_Xlib_Graphics_Driver fl_xlib_driver;
static Fl_Display_Device fl_xlib_display(&fl_xlib_driver);