diff --git a/src/mesa/drivers/dri/common/dri_bufmgr_fake.c b/src/mesa/drivers/dri/common/dri_bufmgr_fake.c
index e08b5b3c7fb..003ac49f3b4 100644
--- a/src/mesa/drivers/dri/common/dri_bufmgr_fake.c
+++ b/src/mesa/drivers/dri/common/dri_bufmgr_fake.c
@@ -632,11 +632,11 @@ dri_fake_bo_unreference(dri_bo *bo)
 
    _glthread_LOCK_MUTEX(bufmgr_fake->mutex);
    if (--bo_fake->refcount == 0) {
-      _glthread_UNLOCK_MUTEX(bufmgr_fake->mutex);
       /* No remaining references, so free it */
       if (bo_fake->block)
 	 free_block(bufmgr_fake, bo_fake->block);
       free_backing_store(bo);
+      _glthread_UNLOCK_MUTEX(bufmgr_fake->mutex);
       free(bo);
       return;
    }