diff --git a/script/normalise-structure b/script/normalise-structure
index 7f3c133f0..18ba81431 100644
--- a/script/normalise-structure
+++ b/script/normalise-structure
@@ -3,5 +3,3 @@
 /^SET default_with_oids /d
 /^SET default_table_access_method /d
 /^SET idle_in_transaction_session_timeout /d
-
-s/ IMMUTABLE / /