diff --git a/bin/pt-archiver b/bin/pt-archiver
index a6c10fa8..3a93c65b 100755
--- a/bin/pt-archiver
+++ b/bin/pt-archiver
@@ -5811,7 +5811,18 @@ sub main {
       $next_sql .= " AND $sel_stmt->{where}";
    }
 
+   # Obtain index cols so we can order them when ascending 
+   # this ensures returned sets are disjoint when ran on partitioned tables
+   # issue 1376561
+   my $index_cols;
+   if (  $sel_stmt->{index} 
+         && $src->{info}->{keys}->{$sel_stmt->{index}}->{cols} 
+   ) {
+      $index_cols = $src->{info}->{keys}->{$sel_stmt->{index}}->{colnames};
+   }
+
    foreach my $thing ( $first_sql, $next_sql ) {
+      $thing .= " ORDER BY $index_cols " if $index_cols; 
       $thing .= " LIMIT $limit";
       if ( $o->get('for-update') ) {
          $thing .= ' FOR UPDATE';
diff --git a/t/pt-archiver/basics.t b/t/pt-archiver/basics.t
index b0101468..f2f43d79 100644
--- a/t/pt-archiver/basics.t
+++ b/t/pt-archiver/basics.t
@@ -161,7 +161,7 @@ $output = output(
 my $t = time - $t0;
 
 ok(
-   $t >= 2 && $t <= 3.5,
+   $t >= 2 && $t <= ($ENV{PERCONA_SLOW_BOX} ? 5 : 3),
    "--sleep between SELECT (bug 979092)"
 ) or diag($output, "t=", $t);
 
diff --git a/t/pt-archiver/indexes.t b/t/pt-archiver/indexes.t
index 646b05da..bb698950 100644
--- a/t/pt-archiver/indexes.t
+++ b/t/pt-archiver/indexes.t
@@ -97,7 +97,7 @@ is($output, '', "No output when --no-ascend");
 
 # Check ascending only first column
 $output = `$cmd --where 1=1 --dry-run --ascend-first --source D=test,t=table_5,F=$cnf --purge --limit 50 2>&1`;
-like ( $output, qr/WHERE \(1=1\) AND \(\(`a` >= \?\)\) LIMIT/, 'Can ascend just first column');
+like ( $output, qr/WHERE \(1=1\) AND \(\(`a` >= \?\)\) ORDER BY `a`,`b`,`c`,`d`  LIMIT/, 'Can ascend just first column');
 
 # #############################################################################
 # Done.
diff --git a/t/pt-archiver/samples/issue-248.txt b/t/pt-archiver/samples/issue-248.txt
index 6f517a4d..bd2b0cfd 100644
--- a/t/pt-archiver/samples/issue-248.txt
+++ b/t/pt-archiver/samples/issue-248.txt
@@ -1,3 +1,3 @@
-SELECT /*!40001 SQL_NO_CACHE */ `film_id`,`title`,`description`,`release_year`,`language_id`,`original_language_id`,`rental_duration`,`rental_rate`,`length`,`replacement_cost`,`rating`,`special_features`,`last_update` FROM `sakila`.`film` FORCE INDEX(`PRIMARY`) WHERE (film_id < 100) AND (`film_id` < '1000') LIMIT 1
-SELECT /*!40001 SQL_NO_CACHE */ `film_id`,`title`,`description`,`release_year`,`language_id`,`original_language_id`,`rental_duration`,`rental_rate`,`length`,`replacement_cost`,`rating`,`special_features`,`last_update` FROM `sakila`.`film` FORCE INDEX(`PRIMARY`) WHERE (film_id < 100) AND (`film_id` < '1000') AND ((`film_id` >= ?)) LIMIT 1
+SELECT /*!40001 SQL_NO_CACHE */ `film_id`,`title`,`description`,`release_year`,`language_id`,`original_language_id`,`rental_duration`,`rental_rate`,`length`,`replacement_cost`,`rating`,`special_features`,`last_update` FROM `sakila`.`film` FORCE INDEX(`PRIMARY`) WHERE (film_id < 100) AND (`film_id` < '1000') ORDER BY `film_id`  LIMIT 1
+SELECT /*!40001 SQL_NO_CACHE */ `film_id`,`title`,`description`,`release_year`,`language_id`,`original_language_id`,`rental_duration`,`rental_rate`,`length`,`replacement_cost`,`rating`,`special_features`,`last_update` FROM `sakila`.`film` FORCE INDEX(`PRIMARY`) WHERE (film_id < 100) AND (`film_id` < '1000') AND ((`film_id` >= ?)) ORDER BY `film_id`  LIMIT 1
 DELETE FROM `sakila`.`film` WHERE (`film_id` = ?)