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-rw-r--r--progs/xdemos/glxswapcontrol.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/progs/xdemos/glxswapcontrol.c b/progs/xdemos/glxswapcontrol.c
index 98b3d1b58f..0ed5ebe472 100644
--- a/progs/xdemos/glxswapcontrol.c
+++ b/progs/xdemos/glxswapcontrol.c
@@ -576,7 +576,7 @@ event_loop(Display *dpy, Window win)
static void
show_refresh_rate( Display * dpy )
{
-#if defined(GLX_OML_sync_control) && (__STDC_VERSION__ >= 199901L)
+#if defined(GLX_OML_sync_control) && defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L)
PFNGLXGETMSCRATEOMLPROC get_msc_rate;
int32_t n;
int32_t d;