diff --git a/push.sh b/push.sh
index e67d82b..4c5438e 100755
--- a/push.sh
+++ b/push.sh
@@ -58,7 +58,7 @@ chmod 0600 .tmp/*
 pushd site
 
 hugo
-if [ $? ne 0 ]
+if [ "$?" -ne 0 ]
 then
     echo "Hugo build failed"
     exit 1