diff --git a/src/gallium/state_trackers/glx/xlib/glx_api.c b/src/gallium/state_trackers/glx/xlib/glx_api.c
index 88f58863fff..a66ebc8e8a4 100644
--- a/src/gallium/state_trackers/glx/xlib/glx_api.c
+++ b/src/gallium/state_trackers/glx/xlib/glx_api.c
@@ -1369,9 +1369,7 @@ glXDestroyContext( Display *dpy, GLXContext ctx )
 PUBLIC Bool
 glXIsDirect( Display *dpy, GLXContext ctx )
 {
-   GLXContext glxCtx = ctx;
-   (void) ctx;
-   return glxCtx->isDirect;
+   return ctx ? ctx->isDirect : False;
 }