diff --git a/src/mesa/main/context.c b/src/mesa/main/context.c
index 2ae0e12..84179a5 100644
--- a/src/mesa/main/context.c
+++ b/src/mesa/main/context.c
@@ -652,7 +652,8 @@ delete_framebuffer_cb(GLuint id, void *data, void *userData)
     */
    /*assert(fb->RefCount == 1);*/
    fb->RefCount = 0;
-   fb->Delete(fb);
+   if (fb->Delete)
+      fb->Delete(fb);
 }
 
 /**