diff --git a/core/trino-grammar/src/main/antlr4/io/trino/grammar/sql/SqlBase.g4 b/core/trino-grammar/src/main/antlr4/io/trino/grammar/sql/SqlBase.g4
index e03d57ba7e2a..e7dce256f80c 100644
--- a/core/trino-grammar/src/main/antlr4/io/trino/grammar/sql/SqlBase.g4
+++ b/core/trino-grammar/src/main/antlr4/io/trino/grammar/sql/SqlBase.g4
@@ -1030,7 +1030,7 @@ nonReserved
     | FAST | FETCH | FILTER | FINAL | FIRST | FOLLOWING | FORMAT | FORWARD | FUNCTION | FUNCTIONS
     | GRACE | GRANT | GRANTED | GRANTS | GRAPHVIZ | GROUPS
     | HOUR
-    | IF | IGNORE | IMMEDIATE | INCLUDING | INITIAL | INPUT | INTERVAL | INVOKER | IO | ITERATE | ISOLATION
+    | IF | IGNORE | INCLUDING | INITIAL | INPUT | INTERVAL | INVOKER | IO | ITERATE | ISOLATION
     | JSON
     | KEEP | KEY | KEYS
     | LANGUAGE | LAST | LATERAL | LEADING | LEAVE | LEVEL | LIMIT | LOCAL | LOGICAL | LOOP