diff --git a/manifests/resource/key.pp b/manifests/resource/key.pp
index 25eb629..6ec3394 100644
--- a/manifests/resource/key.pp
+++ b/manifests/resource/key.pp
@@ -13,7 +13,7 @@
   $bits=4096, $passphrase='', $type='rsa') {
   file { $root:
     ensure => $ensure ? { present => directory, default => absent },
-    mode => 0700,
+    mode => '0700',
     owner => $user,
     group => $user,
   }
@@ -28,10 +28,10 @@
   }
   file {
     $keypath:
-      mode => 0600,
+      mode => '0600',
       require => Exec["create ssh-key for $user with name $title"];
     "${keypath}.pub":
-      mode => 0644,
+      mode => '0644',
       require => Exec["create ssh-key for $user with name $title"];
   }
 }
diff --git a/manifests/resource/known_hosts.pp b/manifests/resource/known_hosts.pp
index 62502f9..be64306 100644
--- a/manifests/resource/known_hosts.pp
+++ b/manifests/resource/known_hosts.pp
@@ -31,7 +31,7 @@
     path => [ "/bin/", "/sbin/" , "/usr/bin/", "/usr/sbin/" ],
   }
   file { $hosthash:
-    mode => 0600,
+    mode => '0600',
   }
 
   # Construct the right and proper known_hosts file.
@@ -42,7 +42,7 @@
     path => [ "/bin/", "/sbin/" , "/usr/bin/", "/usr/sbin/" ],
   }
   file { "${known_hosts}":
-    mode => 0600,
+    mode => '0600',
   }
 
   ## Ensure that all files and execs get the correct user/group combinations.