diff --git a/syncthingconnector/org.freedesktop.DBus.Properties.xml b/syncthingconnector/org.freedesktop.DBus.Properties.xml
index a0af918..2672f88 100644
--- a/syncthingconnector/org.freedesktop.DBus.Properties.xml
+++ b/syncthingconnector/org.freedesktop.DBus.Properties.xml
@@ -17,6 +17,7 @@
         </method>
         <signal name="PropertiesChanged">
             <annotation name="org.qtproject.QtDBus.QtTypeName.In1" value="QVariantMap"/>
+            <annotation name="org.qtproject.QtDBus.QtTypeName.Out1" value="QVariantMap"/>
             <arg type="s" name="interface" />
             <arg type="a{sv}" name="changed_properties" />
             <arg type="as" name="invalidated_properties" />