diff --git a/glamor/glamor.c b/glamor/glamor.c
index 3baef4b9f..b8406f42d 100644
--- a/glamor/glamor.c
+++ b/glamor/glamor.c
@@ -414,6 +414,7 @@ glamor_debug_output_callback(GLenum source,
 
     LogMessageVerb(X_ERROR, 0, "glamor%d: GL error: %*s\n",
                screen->myNum, length, message);
+    xorg_backtrace();
 }
 
 /**