diff --git a/config/ext.json b/config/ext.json
index 25604c89..85be0b7d 100644
--- a/config/ext.json
+++ b/config/ext.json
@@ -524,7 +524,7 @@
         },
         "notes": true,
         "type": "builtin",
-        "arg-type": "with-prefix",
+        "arg-type": "custom",
         "lib-depends": [
             "postgresql"
         ]