diff --git a/src/drivers/Xlib/Fl_Xlib_Graphics_Driver_image.cxx b/src/drivers/Xlib/Fl_Xlib_Graphics_Driver_image.cxx
index a7e548541..445c255c8 100644
--- a/src/drivers/Xlib/Fl_Xlib_Graphics_Driver_image.cxx
+++ b/src/drivers/Xlib/Fl_Xlib_Graphics_Driver_image.cxx
@@ -53,7 +53,20 @@
 #  include <FL/Fl_Image_Surface.H>
 #  include "../../Fl_XColor.H"
 #  include "../../flstring.h"
-#include <X11/Xregion.h>
+
+#if HAVE_X11_XREGION_H
+#   include <X11/Xregion.h>
+#else // if the X11/Xregion.h header is not available, we assume this is the layout of an X11 Region:
+typedef struct {
+  short x1, x2, y1, y2;
+} BOX;
+struct _XRegion {
+  long size;
+  long numRects;
+  BOX *rects;
+  BOX extents;
+};
+#endif // HAVE_X11_XREGION_H
 
 static XImage xi;	// template used to pass info to X
 static int bytes_per_pixel;