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-rw-r--r--progs/xdemos/wincopy.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/progs/xdemos/wincopy.c b/progs/xdemos/wincopy.c
index 04fa98a78a6..3ec67dc6724 100644
--- a/progs/xdemos/wincopy.c
+++ b/progs/xdemos/wincopy.c
@@ -32,7 +32,7 @@
*/
-
+#define GLX_GLXEXT_PROTOTYPES
#include <GL/gl.h>
#include <GL/glx.h>
#include <X11/keysym.h>