diff --git a/docs/en/operations/table_engines/replacingmergetree.md b/docs/en/operations/table_engines/replacingmergetree.md
index 53b9a47c5c2..d630e3b2e70 100644
--- a/docs/en/operations/table_engines/replacingmergetree.md
+++ b/docs/en/operations/table_engines/replacingmergetree.md
@@ -17,6 +17,7 @@ CREATE TABLE [IF NOT EXISTS] [db.]table_name [ON CLUSTER cluster]
 ) ENGINE = ReplacingMergeTree([ver])
 [PARTITION BY expr]
 [ORDER BY expr]
+[PRIMARY KEY expr]
 [SAMPLE BY expr]
 [SETTINGS name=value, ...]
 ```