diff --git a/bin/cdist-config b/bin/cdist-config
index 662f9515..3e474331 100755
--- a/bin/cdist-config
+++ b/bin/cdist-config
@@ -23,7 +23,7 @@
 
 # Fail if something bogus is going on and export all variables
 # The export is mainly needed for remote knowledge
-set -au
+set -u
 
 # Values can be overriden from outside, so you can
 # customise paths as you like (for distributors, geeks and hackers)