diff --git a/docs/reference/api/ModemManager-docs.xml b/docs/reference/api/ModemManager-docs.xml
index 93d6e953..2918af6b 100644
--- a/docs/reference/api/ModemManager-docs.xml
+++ b/docs/reference/api/ModemManager-docs.xml
@@ -19,22 +19,22 @@
 
     <authorgroup>
       <author>
-	    <firstname>Dan</firstname>
-	    <surname>Williams</surname>
-	    <affiliation>
-	      <address>
-	        <email>dcbw@redhat.com</email>
-	      </address>
-	    </affiliation>
+        <firstname>Dan</firstname>
+        <surname>Williams</surname>
+        <affiliation>
+          <address>
+            <email>dcbw@redhat.com</email>
+          </address>
+        </affiliation>
       </author>
       <author>
-	    <firstname>Aleksander</firstname>
-	    <surname>Morgado</surname>
-	    <affiliation>
-	      <address>
-	        <email>aleksander@aleksander.es</email>
-	      </address>
-	    </affiliation>
+        <firstname>Aleksander</firstname>
+        <surname>Morgado</surname>
+        <affiliation>
+          <address>
+            <email>aleksander@aleksander.es</email>
+          </address>
+        </affiliation>
       </author>
     </authorgroup>
 
diff --git a/docs/reference/libmm-glib/libmm-glib-docs.xml b/docs/reference/libmm-glib/libmm-glib-docs.xml
index 57789369..ec4d4c98 100644
--- a/docs/reference/libmm-glib/libmm-glib-docs.xml
+++ b/docs/reference/libmm-glib/libmm-glib-docs.xml
@@ -19,13 +19,13 @@
 
     <authorgroup>
       <author>
-	    <firstname>Aleksander</firstname>
-	    <surname>Morgado</surname>
-	    <affiliation>
-	      <address>
-	        <email>aleksander@aleksander.es</email>
-	      </address>
-	    </affiliation>
+        <firstname>Aleksander</firstname>
+        <surname>Morgado</surname>
+        <affiliation>
+          <address>
+            <email>aleksander@aleksander.es</email>
+          </address>
+        </affiliation>
       </author>
     </authorgroup>