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-rw-r--r--src/glx/x11/glxclient.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/glx/x11/glxclient.h b/src/glx/x11/glxclient.h
index 6852fd066a..166673847c 100644
--- a/src/glx/x11/glxclient.h
+++ b/src/glx/x11/glxclient.h
@@ -137,6 +137,8 @@ extern const char *glXGetScreenDriver (Display *dpy, int scrNum);
extern const char *glXGetDriverConfig (const char *driverName);
+extern Bool __glXWindowExists(Display *dpy, GLXDrawable draw);
+
#endif
/************************************************************************/