diff --git a/manifests/init.pp b/manifests/init.pp
index 20023cb..cffc796 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -240,8 +240,8 @@
 
   # Determine hiera version
   case $hiera_version {
-    '5':  { if $hierarchy !~ Hiera::Hiera5_hierarchy {
-              fail{"${hierarchy} should be an array of hash":}
+    '5':  { if ($hierarchy !~ Hiera::Hiera5_hierarchy) {
+              fail('${hierarchy} should be an array of hash')
             }
             else
               { $hiera_template = epp('hiera/hiera.yaml.epp',