diff --git a/build_iwd.sh b/build_iwd.sh
index 6dbc5e8..803ec21 100755
--- a/build_iwd.sh
+++ b/build_iwd.sh
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/sh -e
 if [ -z "${WORKSPACE}" ]; then
 	export WORKSPACE="$(pwd)"
 fi