diff --git a/manifests/allow.pp b/manifests/allow.pp
index 267f859..2276ccc 100644
--- a/manifests/allow.pp
+++ b/manifests/allow.pp
@@ -1,7 +1,7 @@
 define interfaces::allow ( $subsystem ) {
-	concat::fragment{"interfaces::allow-${subsystem}_${name}":
-		target => '/etc/network/interfaces',
-		content => "allow-${subsystem} ${name}\n\n",
-	}
+  concat::fragment{"interfaces::allow-${subsystem}_${name}":
+    target => '/etc/network/interfaces',
+    content => "allow-${subsystem} ${name}\n\n",
+  }
 }
 
diff --git a/manifests/auto.pp b/manifests/auto.pp
index aa09603..1a74266 100644
--- a/manifests/auto.pp
+++ b/manifests/auto.pp
@@ -1,6 +1,6 @@
 define interfaces::auto ( ) {
-	concat::fragment{"interfaces::auto_${name}":
-		target => '/etc/network/interfaces',
-		content => "auto ${name}\n\n",
-	}
+  concat::fragment{"interfaces::auto_${name}":
+    target => '/etc/network/interfaces',
+    content => "auto ${name}\n\n",
+  }
 }
diff --git a/manifests/iface.pp b/manifests/iface.pp
index ec8a7ab..92d43a0 100644
--- a/manifests/iface.pp
+++ b/manifests/iface.pp
@@ -1,11 +1,11 @@
 define interfaces::iface ( $family, $method, $options=[], $auto=0, $ifname=$name ) {
-	if $auto == 1 {
-		interfaces::auto { "${ifname}": }
-	}
+  if $auto == 1 {
+    interfaces::auto { "${ifname}": }
+  }
 
-	$str = "iface ${ifname} ${family} ${method}\n	<%= options.join('\n	') %>\n\n"
-	concat::fragment{"interfaces::iface_${name}":
-		target => '/etc/network/interfaces',
-		content => inline_template($str),
-	}
+  $str = "iface ${ifname} ${family} ${method}\n	<%= options.join('\n	') %>\n\n"
+  concat::fragment{"interfaces::iface_${name}":
+    target => '/etc/network/interfaces',
+    content => inline_template($str),
+  }
 }
diff --git a/manifests/init.pp b/manifests/init.pp
index d07bd67..d8204c0 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -1,15 +1,15 @@
 class interfaces {
-	include concat::setup
+  include concat::setup
 
-	concat{'/etc/network/interfaces':
-		owner => root,
-		group => root,
-		mode => 644,
-	}
+  concat{'/etc/network/interfaces':
+    owner => root,
+    group => root,
+    mode => 644,
+  }
 
-	concat::fragment{'interfaces_header':
-		target => '/etc/network/interfaces',
-		content => "# This file describes the network interfaces available on your system\n# and how to activate them. For more information, see interfaces(5).\n\n# Generated by puppet for ${fqdn}, DO NOT MODIFY!\n\n",
-		order => 01,
-	}
+  concat::fragment{'interfaces_header':
+    target => '/etc/network/interfaces',
+    content => "# This file describes the network interfaces available on your system\n# and how to activate them. For more information, see interfaces(5).\n\n# Generated by puppet for ${fqdn}, DO NOT MODIFY!\n\n",
+    order => 01,
+  }
 }
diff --git a/manifests/mapping.pp b/manifests/mapping.pp
index 195624e..178686d 100644
--- a/manifests/mapping.pp
+++ b/manifests/mapping.pp
@@ -1,7 +1,7 @@
 define interfaces::mapping ( $script, $maps ) {
-	$str = "mapping ${name}\n	script ${script}\n	<%= maps.join('\n	') %>\n\n"
-	concat::fragment{"interfaces::mapping_${name}":
-		target => '/etc/network/interfaces',
-		content => inline_template($str),
-	}
+  $str = "mapping ${name}\n	script ${script}\n	<%= maps.join('\n	') %>\n\n"
+  concat::fragment{"interfaces::mapping_${name}":
+    target => '/etc/network/interfaces',
+    content => inline_template($str),
+  }
 }