diff --git a/emit_gpt_scripts.sh b/emit_gpt_scripts.sh
index 12e3629f1b..692e836ef8 100755
--- a/emit_gpt_scripts.sh
+++ b/emit_gpt_scripts.sh
@@ -28,7 +28,7 @@ locate_gpt
 TMP=$(mktemp)
 $GPT show "$IMAGE" > $TMP
 
-HEADER='#!/bin/sh -eu
+HEADER='#!/bin/bash -eu
 # File generated by emit_gpt_scripts.sh. Do not edit.
 TARGET=${1:-}
 if [[ -z "$TARGET" ]]; then