diff --git a/mysql-test/include/index_merge2.inc b/mysql-test/include/index_merge2.inc
index 1d6b82e1787..99af143a4e0 100644
--- a/mysql-test/include/index_merge2.inc
+++ b/mysql-test/include/index_merge2.inc
@@ -343,6 +343,7 @@ alter table t1 add index i3(key3);
 update t1 set key2=key1,key3=key1;
 
 # to test the bug, the following must use "sort_union":
+--replace_column 9 ROWS
 explain select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40);
 select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40);
 drop table t1;
diff --git a/mysql-test/r/index_merge_innodb.result b/mysql-test/r/index_merge_innodb.result
index b00a949fcbc..7a8a8db517e 100644
--- a/mysql-test/r/index_merge_innodb.result
+++ b/mysql-test/r/index_merge_innodb.result
@@ -313,7 +313,7 @@ alter table t1 add index i3(key3);
 update t1 set key2=key1,key3=key1;
 explain select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index_merge	i2,i3	i3,i2	4,4	NULL	8	Using sort_union(i3,i2); Using where
+1	SIMPLE	t1	index_merge	i2,i3	i3,i2	4,4	NULL	ROWS	Using sort_union(i3,i2); Using where
 select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40);
 key1	key2	key3
 31	31	31
diff --git a/mysql-test/r/index_merge_myisam.result b/mysql-test/r/index_merge_myisam.result
index b560c1e5176..8bb3f95934d 100644
--- a/mysql-test/r/index_merge_myisam.result
+++ b/mysql-test/r/index_merge_myisam.result
@@ -1146,7 +1146,7 @@ alter table t1 add index i3(key3);
 update t1 set key2=key1,key3=key1;
 explain select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40);
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
-1	SIMPLE	t1	index_merge	i2,i3	i3,i2	4,4	NULL	11	Using sort_union(i3,i2); Using where
+1	SIMPLE	t1	index_merge	i2,i3	i3,i2	4,4	NULL	ROWS	Using sort_union(i3,i2); Using where
 select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40);
 key1	key2	key3
 31	31	31