diff --git a/clang/tools/diag-build/diag-build.sh b/clang/tools/diag-build/diag-build.sh
--- a/clang/tools/diag-build/diag-build.sh
+++ b/clang/tools/diag-build/diag-build.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # diag-build: a tool showing enabled warnings in a project.
 #
diff --git a/clang/utils/make-ast-dump-check.sh b/clang/utils/make-ast-dump-check.sh
--- a/clang/utils/make-ast-dump-check.sh
+++ b/clang/utils/make-ast-dump-check.sh
@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/usr/bin/env bash
 
 # This script is intended as a FileCheck replacement to update the test
 # expectations in a -ast-dump test.