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-rw-r--r--src/glx/glx_pbuffer.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/src/glx/glx_pbuffer.c b/src/glx/glx_pbuffer.c
index 5f91bc623a9..ec54f1e09d6 100644
--- a/src/glx/glx_pbuffer.c
+++ b/src/glx/glx_pbuffer.c
@@ -137,6 +137,9 @@ ChangeDrawableAttribute(Display * dpy, GLXDrawable drawable,
#ifdef GLX_DIRECT_RENDERING
pdraw = GetGLXDRIDrawable(dpy, drawable);
+ if (!pdraw)
+ return;
+
for (i = 0; i < num_attribs; i++) {
switch(attribs[i * 2]) {
case GLX_EVENT_MASK: