diff --git a/manifests/network.pp b/manifests/network.pp
index 79f74ab..55a14ac 100644
--- a/manifests/network.pp
+++ b/manifests/network.pp
@@ -1,41 +1,41 @@
 # @summary Creates network config for systemd-networkd
 define systemd::network (
   Enum['file', 'absent']         $ensure          = file,
   Stdlib::Absolutepath           $path            = '/etc/systemd/network',
   Optional[String]               $content         = undef,
   Optional[String]               $source          = undef,
   Optional[Stdlib::Absolutepath] $target          = undef,
   String                         $owner           = 'root',
   String                         $group           = 'root',
   String                         $mode            = '0444',
   Boolean                        $show_diff       = true,
   Boolean                        $restart_service = true,
 ) {
   include systemd
 
   if $restart_service and $systemd::manage_networkd {
     $notify = Service['systemd-networkd']
   } else {
     $notify = undef
   }
 
   if $ensure == 'file' {
     if $content =~ Undef and $source =~ Undef {
       fail('Either content or source must be set but not both')
     }
     if $content =~ NotUndef and $source =~ NotUndef {
-      fail('you can only set $content or $source')
+      fail('Either content or source must be set')
     }
   }
   file { "${path}/${name}":
     ensure    => $ensure,
     content   => $content,
     source    => $source,
     target    => $target,
     owner     => $owner,
     group     => $group,
     mode      => $mode,
     show_diff => $show_diff,
     notify    => $notify,
   }
 }