diff --git a/puppet/manifests/init.pp b/puppet/manifests/init.pp
index 198b959..ea1286e 100644
--- a/puppet/manifests/init.pp
+++ b/puppet/manifests/init.pp
@@ -187,11 +187,15 @@ class puppet::server::mongrel inherits puppet::client {
         before => File["/etc/puppet/puppet.conf"],
     }
 
-    exec { "stop-puppetmaster":
-        command     => "pkill -u puppet ; true",
-        path        => "/bin:/usr/bin:/sbin:/usr/sbin",
-        refreshonly => true,
-        before      => File["/etc/default/puppetmaster"],
+    case $operatingsystem {
+        "debian","ubuntu": {
+            exec { "stop-puppetmaster":
+                command     => "pkill -u puppet ; true",
+                path        => "/bin:/usr/bin:/sbin:/usr/sbin",
+                refreshonly => true,
+                before      => File["/etc/default/puppetmaster"],
+            }
+        }
     }
 
     include ::mongrel