diff --git a/manifests/iface.pp b/manifests/iface.pp
index 9eb49a8..d1d6eef 100644
--- a/manifests/iface.pp
+++ b/manifests/iface.pp
@@ -8,7 +8,7 @@
     interfaces::auto { $_ifname: }
   }
 
-  $str = "iface ${_ifname} ${family} ${method}\n	<%= options.join('\n	') %>\n\n"
+  $str = "iface ${_ifname} ${family} ${method}\n\t<%= options.join('\n\t') %>\n\n"
   concat::fragment{"interfaces::iface_${name}":
     target  => '/etc/network/interfaces',
     content => inline_template($str),
diff --git a/manifests/mapping.pp b/manifests/mapping.pp
index a74abf6..8fe109e 100644
--- a/manifests/mapping.pp
+++ b/manifests/mapping.pp
@@ -1,5 +1,5 @@
 define interfaces::mapping ( $script, $maps ) {
-  $str = "mapping ${name}\n	script ${script}\n	<%= maps.join('\n	') %>\n\n"
+  $str = "mapping ${name}\n\tscript ${script}\n\t<%= maps.join('\n\t') %>\n\n"
   concat::fragment{"interfaces::mapping_${name}":
     target  => '/etc/network/interfaces',
     content => inline_template($str),