diff --git a/sources/Gtk.metadata b/sources/Gtk.metadata
index 68a164b8e..ee229879e 100644
--- a/sources/Gtk.metadata
+++ b/sources/Gtk.metadata
@@ -1305,9 +1305,9 @@ z<rule>
   </class>
   <data>
     <attribute target="param">
-      <filter level="type">const-gchar*</filter>
-      <name>array</name>
-      <value>1</value>
+      <filter level="name">buffer</filter>
+      <name>type</name>
+      <value>byte*</value>
     </attribute>
   </data>
 </rule>