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Diffstat (limited to 'src/drivers/X11/Fl_X11_Window_Driver.H')
-rw-r--r--src/drivers/X11/Fl_X11_Window_Driver.H1
1 files changed, 1 insertions, 0 deletions
diff --git a/src/drivers/X11/Fl_X11_Window_Driver.H b/src/drivers/X11/Fl_X11_Window_Driver.H
index e976619ee..e255e8c94 100644
--- a/src/drivers/X11/Fl_X11_Window_Driver.H
+++ b/src/drivers/X11/Fl_X11_Window_Driver.H
@@ -69,6 +69,7 @@ private:
void shape_alpha_(Fl_Image* img, int offset);
void flush_double(int erase_overlay);
#ifdef USE_XDBE
+ char backbuffer_bad;
void flush_double_dbe(int erase_overlay);
#endif