diff --git a/lib/fuse.c b/lib/fuse.c
index dc1ab10..3178b1a 100644
--- a/lib/fuse.c
+++ b/lib/fuse.c
@@ -2068,6 +2068,7 @@
     }
 
     mutex_init(&f->lock);
+    pthread_rwlock_init(&f->tree_lock, NULL);
     memcpy(&f->op, op, op_size);
     f->compat = compat;