diff --git a/rustup.sh b/rustup.sh
index 72d71e0..4814770 100755
--- a/rustup.sh
+++ b/rustup.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # Copyright 2015 The Rust Project Developers. See the COPYRIGHT
 # file at the top-level directory of this distribution and at
 # http://rust-lang.org/COPYRIGHT.