diff --git a/src/bin/psql/tab-complete.in.c b/src/bin/psql/tab-complete.in.c
index fad2277991d..bbd08770c3d 100644
--- a/src/bin/psql/tab-complete.in.c
+++ b/src/bin/psql/tab-complete.in.c
@@ -3204,7 +3204,7 @@ match_previous_words(int pattern_id,
 		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");