diff --git a/libfuse-lite/fuse.c b/libfuse-lite/fuse.c
index 1820f26b..1eeed443 100644
--- a/libfuse-lite/fuse.c
+++ b/libfuse-lite/fuse.c
@@ -1813,6 +1813,7 @@ static void fuse_lib_opendir(fuse_req_t req, fuse_ino_t ino,
         }
     } else {
         reply_err(req, err);
+        pthread_mutex_destroy(&dh->lock);
         free(dh);
     }
     free(path);