diff --git a/setup-toolchain.sh b/setup-toolchain.sh
index 469cba1874d..6038ed697f9 100755
--- a/setup-toolchain.sh
+++ b/setup-toolchain.sh
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 # Set up the appropriate rustc toolchain
 
 set -e