diff --git a/src/dbus/org.freedesktop.DBus.ObjectManager.xml b/src/dbus/org.freedesktop.DBus.ObjectManager.xml
index 2f9452cdb..81a9b9993 100644
--- a/src/dbus/org.freedesktop.DBus.ObjectManager.xml
+++ b/src/dbus/org.freedesktop.DBus.ObjectManager.xml
@@ -8,8 +8,8 @@
 	</method>
 	<signal name="InterfacesAdded">
 	    <arg name="object" type="o" />
-	    <arg name="interfaces" type="a{sa{sv}}" />
-	    <annotation name="org.qtproject.QtDBus.QtTypeName.In1" value="InterfacesAndProperties" />
+	    <arg name="interfaces" type="a{sa{sv}}" direction="out" />
+	    <annotation name="org.qtproject.QtDBus.QtTypeName.Out1" value="InterfacesAndProperties" />
 	</signal>
 	<signal name="InterfacesRemoved">
 	    <arg type="o" name="object_path" />
diff --git a/src/dbus/org.mpris.MediaPlayer2.Playlists.xml b/src/dbus/org.mpris.MediaPlayer2.Playlists.xml
index ae1fc12c8..efadfbcb6 100644
--- a/src/dbus/org.mpris.MediaPlayer2.Playlists.xml
+++ b/src/dbus/org.mpris.MediaPlayer2.Playlists.xml
@@ -20,7 +20,7 @@
 			<annotation name="org.qtproject.QtDBus.QtTypeName.Out0" value="MprisPlaylistList" />
 		</method>
 		<signal name='PlaylistChanged'>
-			<arg name='Playlist' type='(oss)' />
+			<arg direction='in' name='Playlist' type='(oss)' />
 			<annotation name="org.qtproject.QtDBus.QtTypeName.In0" value="MprisPlaylist" />
 		</signal>
 		<annotation name="org.qtproject.QtDBus.QtTypeName" value="MaybePlaylist" />
diff --git a/src/dbus/org.mpris.MediaPlayer2.TrackList.xml b/src/dbus/org.mpris.MediaPlayer2.TrackList.xml
index 56d9d6859..b02ed35d2 100644
--- a/src/dbus/org.mpris.MediaPlayer2.TrackList.xml
+++ b/src/dbus/org.mpris.MediaPlayer2.TrackList.xml
@@ -24,16 +24,16 @@
 			<arg name='CurrentTrack' type='o' />
 		</signal>
 		<signal name='TrackAdded'>
-		    <arg name='Metadata' type='a{sv}' />
-		    <annotation name="org.qtproject.QtDBus.QtTypeName.In0" value="TrackMetadata" />
-		    <arg name='AfterTrack' type='o' />
+			<arg direction='in' name='Metadata' type='a{sv}' />
+			<annotation name="org.qtproject.QtDBus.QtTypeName.In0" value="TrackMetadata" />
+			<arg name='AfterTrack' type='o' />
 		</signal>
 		<signal name='TrackRemoved'>
 			<arg name='TrackId' type='o' />
 		</signal>
 		<signal name='TrackMetadataChanged'>
 			<arg name='TrackId' type='o' />
-			<arg name='Metadata' type='a{sv}' />
+			<arg direction='in' name='Metadata' type='a{sv}' />
 			<annotation name="org.qtproject.QtDBus.QtTypeName.In1" value="TrackMetadata" />
 		</signal>
 		<property name='Tracks' type='ao' access='read' />