diff --git a/src/revpi_middleware/ios1/interface_devices.py b/src/revpi_middleware/ios1/interface_devices.py
index c9aa901..70da85e 100644
--- a/src/revpi_middleware/ios1/interface_devices.py
+++ b/src/revpi_middleware/ios1/interface_devices.py
@@ -16,15 +16,33 @@ class InterfaceDevice:
     """
     <node>
         <interface name="com.revolutionpi.ios1.Device">
-            <property name="bmk" type="s" access="read"/>
-            <property name="catalognr" type="s" access="read"/>
-            <property name="comment" type="s" access="read"/>
-            <property name="id" type="s" access="read"/>
-            <property name="inp" type="ao" access="read"/>
-            <property name="name" type="s" access="read"/>
-            <property name="out" type="ao" access="read"/>
-            <property name="position" type="n" access="read"/>
-            <property name="type" type="s" access="read"/>
+            <property name="bmk" type="s" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="catalognr" type="s" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="comment" type="s" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="id" type="s" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="inp" type="ao" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="name" type="s" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="out" type="ao" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="position" type="n" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
+            <property name="type" type="s" access="read">
+                <annotation name="org.freedesktop.DBus.Property.EmitsChangedSignal" value="const"/>
+            </property>
         </interface>
     </node>
     """