diff --git a/procmail/manifests/init.pp b/procmail/manifests/init.pp
index 9191621..41680c0 100644
--- a/procmail/manifests/init.pp
+++ b/procmail/manifests/init.pp
@@ -29,7 +29,7 @@ class procmail {
     }
 
     exec { "generate-procmailrc":
-        command     => "( echo 'DROPPRIVS=yes' ; find /etc/procmailrc.d/*.rc -exec echo 'INCLUDERC={}' \; ) > /etc/procmailrc ; true",
+        command     => '( echo "DROPPRIVS=yes" ; find /etc/procmailrc.d/*.rc -exec echo "INCLUDERC={}" \; ) > /etc/procmailrc ; true',
         path        => "/bin:/usr/bin:/sbin:/usr/sbin",
         refreshonly => true,
     }