diff --git a/cdist/conf/type/__apt_mark/explorer/apt_version b/cdist/conf/type/__apt_mark/explorer/apt_version
index 827d9db2..7bb90cc2 100644
--- a/cdist/conf/type/__apt_mark/explorer/apt_version
+++ b/cdist/conf/type/__apt_mark/explorer/apt_version
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/sh -e
 #
 # 2016 Ander Punnar (cdist at kvlt.ee)
 #
diff --git a/cdist/conf/type/__apt_mark/explorer/package_installed b/cdist/conf/type/__apt_mark/explorer/package_installed
index 059e44f4..0b072cbc 100644
--- a/cdist/conf/type/__apt_mark/explorer/package_installed
+++ b/cdist/conf/type/__apt_mark/explorer/package_installed
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/sh -e
 #
 # 2016 Ander Punnar (cdist at kvlt.ee)
 #
diff --git a/cdist/conf/type/__apt_mark/explorer/state b/cdist/conf/type/__apt_mark/explorer/state
index 1dfdc911..b7fe08fa 100644
--- a/cdist/conf/type/__apt_mark/explorer/state
+++ b/cdist/conf/type/__apt_mark/explorer/state
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/sh -e
 #
 # 2016 Ander Punnar (cdist at kvlt.ee)
 #