diff --git a/WORKSPACE b/WORKSPACE
index e50f8cb0eef..cc6c1a83d72 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -101,6 +101,7 @@ py_pkg_cc_deps(
 http_archive(
     name = "nnlib_hifi4",
     build_file = "@tflite_micro//third_party/xtensa/nnlib_hifi4:nnlib_hifi4.BUILD",
+    integrity = "sha256-ulZ+uY4dRsbDUMZbZtD972eghclWQrqYRb0Y4Znfyyc=",
     strip_prefix = "nnlib-hifi4-34f5f995f28d298ae2b6e2ba6e76c32a5cb34989",
     urls = ["https://github.com/foss-xtensa/nnlib-hifi4/archive/34f5f995f28d298ae2b6e2ba6e76c32a5cb34989.zip"],
 )