diff --git a/libvpx/vp9/common/vp9_alloccommon.c b/libvpx/vp9/common/vp9_alloccommon.c
index 24c6c54..aaf9a75 100644
--- a/libvpx/vp9/common/vp9_alloccommon.c
+++ b/libvpx/vp9/common/vp9_alloccommon.c
@@ -164,6 +164,7 @@
   return 0;
 
  fail:
+  vp9_set_mb_mi(cm, 0, 0);
   vp9_free_context_buffers(cm);
   return 1;
 }