diff --git a/src/bin/psql/tab-complete.c b/src/bin/psql/tab-complete.c
index 2e55607b8ad..1bd01ff865f 100644
--- a/src/bin/psql/tab-complete.c
+++ b/src/bin/psql/tab-complete.c
@@ -2873,7 +2873,7 @@ psql_completion(const char *text, int start, int end)
 		COMPLETE_WITH_SCHEMA_QUERY_PLUS(Query_for_list_of_tables, "(");
 	/* Complete COPY ( with legal query commands */
 	else if (Matches("COPY|\\copy", "("))
-		COMPLETE_WITH("SELECT", "TABLE", "VALUES", "INSERT INTO", "UPDATE", "DELETE FROM", "WITH");
+		COMPLETE_WITH("SELECT", "TABLE", "VALUES", "INSERT INTO", "UPDATE", "DELETE FROM", "MERGE INTO", "WITH");
 	/* Complete COPY <sth> */
 	else if (Matches("COPY|\\copy", MatchAny))
 		COMPLETE_WITH("FROM", "TO");