diff --git a/src/revpi_middleware/ios1/interface_ios.py b/src/revpi_middleware/ios1/interface_ios.py
index 8711ec5..3a08937 100644
--- a/src/revpi_middleware/ios1/interface_ios.py
+++ b/src/revpi_middleware/ios1/interface_ios.py
@@ -16,10 +16,10 @@ class InterfaceIoManager:
     <node>
         <interface name="com.revolutionpi.ios1.IoManager">
             <method name="GetAllInputs">
-                <arg type="as" direction="out"/>
+                <arg name="object-path-list" type="ao" direction="out"/>
             </method>
             <method name="GetAllOutputs">
-                <arg type="as" direction="out"/>
+                <arg name="object-path-list" type="ao" direction="out"/>
             </method>
             <method name="Get">
                 <arg name="io_name" type="s" direction="in"/>