diff --git a/.editorconfig b/.editorconfig
index 803abf3..50b7740 100644
--- a/.editorconfig
+++ b/.editorconfig
@@ -10,7 +10,7 @@ indent_size = 8
 max_line_length = 80
 
 [*.xml]
-indent_style = space
+indent_style = tab
 indent_size = 2
 tab_width = 8
 
diff --git a/doc/publican/sources/Book_Info.xml b/doc/publican/sources/Book_Info.xml
index 0b7bf07..897673a 100644
--- a/doc/publican/sources/Book_Info.xml
+++ b/doc/publican/sources/Book_Info.xml
@@ -28,9 +28,9 @@
 	<imagedata fileref="images/wayland.png" format="PNG" />
       </imageobject>
       <textobject>
-        <phrase>
-          Wayland logo
-        </phrase>
+	<phrase>
+	  Wayland logo
+	</phrase>
       </textobject>
     </inlinemediaobject>
   </corpauthor>
diff --git a/doc/publican/sources/Compositors.xml b/doc/publican/sources/Compositors.xml
index ad27f61..7a7bdaa 100644
--- a/doc/publican/sources/Compositors.xml
+++ b/doc/publican/sources/Compositors.xml
@@ -61,8 +61,8 @@
     <para>
        Possible examples for session compositors include
       <itemizedlist>
-        <listitem>
-          <para>
+	<listitem>
+	  <para>
 	    gnome-shell
 	  </para>
 	</listitem>
diff --git a/doc/publican/sources/Foreword.xml b/doc/publican/sources/Foreword.xml
index e6875a3..46fda2b 100644
--- a/doc/publican/sources/Foreword.xml
+++ b/doc/publican/sources/Foreword.xml
@@ -22,7 +22,7 @@
   <literallayout>
 Yours,
 
-        the Wayland open-source community
-        November 2012
+	the Wayland open-source community
+	November 2012
   </literallayout>
 </preface>
diff --git a/doc/publican/sources/Introduction.xml b/doc/publican/sources/Introduction.xml
index 7516c33..276db2d 100644
--- a/doc/publican/sources/Introduction.xml
+++ b/doc/publican/sources/Introduction.xml
@@ -33,9 +33,9 @@
 	<imagedata fileref="images/x-architecture.png" format="PNG" />
       </imageobject>
       <textobject>
-        <phrase>
-          X architecture diagram
-        </phrase>
+	<phrase>
+	  X architecture diagram
+	</phrase>
       </textobject>
     </mediaobject>
     <para>
@@ -96,9 +96,9 @@
 	<imagedata fileref="images/wayland-architecture.png" format="PNG" />
       </imageobject>
       <textobject>
-        <phrase>
-          Wayland architecture diagram
-        </phrase>
+	<phrase>
+	  Wayland architecture diagram
+	</phrase>
       </textobject>
     </mediaobject>
     <para>
diff --git a/doc/publican/sources/Preface.xml b/doc/publican/sources/Preface.xml
index 61720a9..17c6ebf 100644
--- a/doc/publican/sources/Preface.xml
+++ b/doc/publican/sources/Preface.xml
@@ -15,6 +15,6 @@
   <literallayout>
 Best,
 
-        Kristian Høgsberg
+	Kristian Høgsberg
   </literallayout>
 </preface>
diff --git a/doc/publican/sources/Xwayland.xml b/doc/publican/sources/Xwayland.xml
index a39866f..e439991 100644
--- a/doc/publican/sources/Xwayland.xml
+++ b/doc/publican/sources/Xwayland.xml
@@ -78,11 +78,11 @@
     <figure>
       <title>Xwayland architecture diagram</title>
       <mediaobjectco>
-        <imageobjectco>
-          <imageobject>
-            <imagedata fileref="images/xwayland-architecture.png" format="PNG" />
-          </imageobject>
-        </imageobjectco>
+	<imageobjectco>
+	  <imageobject>
+	    <imagedata fileref="images/xwayland-architecture.png" format="PNG" />
+	  </imageobject>
+	</imageobjectco>
       </mediaobjectco>
     </figure>
     <para>
@@ -150,20 +150,20 @@
     <section id="sect-X11-Application-Support-xwm-window-identification">
       <title>Window identification</title>
       <para>
-        In Xwayland, an X11 window may have a corresponding wl_surface object
-        in Wayland. The wl_surface object is used for input and output: it is
-        referenced by input events and used to provide the X11 window content
-        to the Wayland compositor. The X11 window and the wl_surface live in
-        different protocol streams, and they need to be matched for XWM to do
-        its job.
+	In Xwayland, an X11 window may have a corresponding wl_surface object
+	in Wayland. The wl_surface object is used for input and output: it is
+	referenced by input events and used to provide the X11 window content
+	to the Wayland compositor. The X11 window and the wl_surface live in
+	different protocol streams, and they need to be matched for XWM to do
+	its job.
       </para>
       <para>
-        When Xwayland creates a wl_surface on Wayland, it will also send an X11
-        ClientMessage of type atom "WL_SURFACE_ID" to the X11 window carrying
-        the wl_surface Wayland object ID as the first 32-bit data element. This
-        is how XWM can associate a wl_surface with an X11 window. Note that
-        the request to create a wl_surface and the ID message may arrive in any
-        order in the Wayland compositor.
+	When Xwayland creates a wl_surface on Wayland, it will also send an X11
+	ClientMessage of type atom "WL_SURFACE_ID" to the X11 window carrying
+	the wl_surface Wayland object ID as the first 32-bit data element. This
+	is how XWM can associate a wl_surface with an X11 window. Note that
+	the request to create a wl_surface and the ID message may arrive in any
+	order in the Wayland compositor.
       </para>
     </section>
   </section>
diff --git a/protocol/tests.xml b/protocol/tests.xml
index ea56ae4..22d80a1 100644
--- a/protocol/tests.xml
+++ b/protocol/tests.xml
@@ -43,8 +43,8 @@
     <!-- Version 2 additions -->
     <request name="conjoin" since="2">
       <description summary="register another fd passer with this one">
-        Tells this fd passer object about another one to send events
-        to for more complicated fd leak tests.
+	Tells this fd passer object about another one to send events
+	to for more complicated fd leak tests.
       </description>
       <arg name="passer" type="object" interface="fd_passer"/>
     </request>
diff --git a/protocol/wayland.xml b/protocol/wayland.xml
index d3e54ee..5dce532 100644
--- a/protocol/wayland.xml
+++ b/protocol/wayland.xml
@@ -298,7 +298,7 @@
 	will be reported by the format event.
       </description>
       <!-- Note to protocol writers: don't update this list manually, instead
-           run the automated script that keeps it in sync with drm_fourcc.h. -->
+	   run the automated script that keeps it in sync with drm_fourcc.h. -->
       <entry name="argb8888" value="0" summary="32-bit ARGB format, [31:0] A:R:G:B 8:8:8:8 little endian"/>
       <entry name="xrgb8888" value="1" summary="32-bit RGB format, [31:0] x:R:G:B 8:8:8:8 little endian"/>
       <entry name="c8" value="0x20203843" summary="8-bit color index format, [7:0] C"/>
@@ -594,9 +594,9 @@
 	will be raised otherwise.
       </description>
       <arg name="dnd_actions" type="uint" summary="actions supported by the destination client"
-           enum="wl_data_device_manager.dnd_action"/>
+	   enum="wl_data_device_manager.dnd_action"/>
       <arg name="preferred_action" type="uint" summary="action preferred by the destination client"
-           enum="wl_data_device_manager.dnd_action"/>
+	   enum="wl_data_device_manager.dnd_action"/>
     </request>
 
     <event name="source_actions" since="3">
@@ -606,7 +606,7 @@
 	side changes its offered actions through wl_data_source.set_actions.
       </description>
       <arg name="source_actions" type="uint" summary="actions offered by the data source"
-           enum="wl_data_device_manager.dnd_action"/>
+	   enum="wl_data_device_manager.dnd_action"/>
     </event>
 
     <event name="action" since="3">
@@ -648,7 +648,7 @@
 	must happen before the call to wl_data_offer.finish.
       </description>
       <arg name="dnd_action" type="uint" summary="action selected by the compositor"
-           enum="wl_data_device_manager.dnd_action"/>
+	   enum="wl_data_device_manager.dnd_action"/>
     </event>
   </interface>
 
@@ -746,7 +746,7 @@
 	for drag-and-drop will raise a protocol error.
       </description>
       <arg name="dnd_actions" type="uint" summary="actions supported by the data source"
-           enum="wl_data_device_manager.dnd_action"/>
+	   enum="wl_data_device_manager.dnd_action"/>
     </request>
 
     <event name="dnd_drop_performed" since="3">
@@ -803,7 +803,7 @@
 	they reflect the current action.
       </description>
       <arg name="dnd_action" type="uint" summary="action selected by the compositor"
-           enum="wl_data_device_manager.dnd_action"/>
+	   enum="wl_data_device_manager.dnd_action"/>
     </event>
   </interface>
 
diff --git a/tests/data/small.xml b/tests/data/small.xml
index a6e62ad..832ed0e 100644
--- a/tests/data/small.xml
+++ b/tests/data/small.xml
@@ -50,9 +50,9 @@
     <event name="hey"/>
 
     <enum name="foo">
-        <entry name="first" value="0" summary="this is the first"/>
-        <entry name="second" value="1" summary="this is the second"/>
-        <entry name="third" value="2" since="2" summary="this is the third"/>
+	<entry name="first" value="0" summary="this is the first"/>
+	<entry name="second" value="1" summary="this is the second"/>
+	<entry name="third" value="2" since="2" summary="this is the third"/>
     </enum>
   </interface>
 </protocol>