diff --git a/manifests/init.pp b/manifests/init.pp
index 145f166..ca7ec9d 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -28,16 +28,16 @@ class sshd(
   $hostbased_authentication = 'no',
   $permit_empty_passwords = 'no',
   $authorized_keys_file = $::osfamily ? {
-    Debian => $::lsbmajdistrelease ? {
+    'Debian' => $::lsbmajdistrelease ? {
       6       => '%h/.ssh/authorized_keys',
       default => '%h/.ssh/authorized_keys %h/.ssh/authorized_keys2',
     },
-    RedHat => $::operatingsystemmajrelease ? {
+    'RedHat' => $::operatingsystemmajrelease ? {
       5       => '%h/.ssh/authorized_keys',
       6       => '%h/.ssh/authorized_keys',
       default => '%h/.ssh/authorized_keys %h/.ssh/authorized_keys2',
     },
-    OpenBSD => '%h/.ssh/authorized_keys',
+    'OpenBSD' => '%h/.ssh/authorized_keys',
     default => '%h/.ssh/authorized_keys %h/.ssh/authorized_keys2',
   },
   $hardened = 'no',
@@ -70,10 +70,10 @@ class sshd(
   }
 
   case $::operatingsystem {
-    gentoo: { include sshd::gentoo }
-    redhat,centos: { include sshd::redhat }
-    openbsd: { include sshd::openbsd }
-    debian,ubuntu: { include sshd::debian }
+    'gentoo': { include sshd::gentoo }
+    'redhat','centos': { include sshd::redhat }
+    'openbsd': { include sshd::openbsd }
+    'debian','ubuntu': { include sshd::debian }
     default: { include sshd::base }
   }