diff --git a/data/org.gnome.ShellSearchProvider.xml b/data/org.gnome.ShellSearchProvider.xml
index 16fa9ad0a..558e6620c 100644
--- a/data/org.gnome.ShellSearchProvider.xml
+++ b/data/org.gnome.ShellSearchProvider.xml
@@ -108,7 +108,7 @@
           </doc:summary>
         </doc:doc>
       </arg>
-      <arg type="a{sv}" direction="out">
+      <arg type="aa{sv}" direction="out">
         <doc:doc>
           <doc:summary>
             <doc:para>