diff --git a/source/dga_check.c b/source/dga_check.c
index e7fbe3c..d2d95a5 100644
--- a/source/dga_check.c
+++ b/source/dga_check.c
@@ -43,6 +43,9 @@
 #ifdef HAVE_VIDMODE
 # include <X11/extensions/xf86vmode.h>
 # include <X11/extensions/xf86vmstr.h>
+# ifndef XDGA_MAJOR_VERSION
+#  define XDGA_MAJOR_VERSION XF86DGA_MAJOR_VERSION
+# endif
 #endif
 
 #include "console.h"