diff --git a/src/lib/Hydra/Helper/BuildDiff.pm b/src/lib/Hydra/Helper/BuildDiff.pm
index 612ecbf3..56d7ddae 100644
--- a/src/lib/Hydra/Helper/BuildDiff.pm
+++ b/src/lib/Hydra/Helper/BuildDiff.pm
@@ -17,13 +17,13 @@ sub cmpBuilds {
         || $left->get_column('system') cmp $right->get_column('system')
 }
 
-    # $builds  = sort { cmpBuilds($a, $b) } $builds;
-    # $builds2 = sort { cmpBuilds($a, $b) } $builds2;
-
 sub buildDiff {
     my ($builds, $builds2) = @_;
     # $builds is the list of current builds, and $builds2 is the list of previous (compared-to) builds
 
+    $builds  = [sort { cmpBuilds($a, $b) } @{$builds}];
+    $builds2 = [sort { cmpBuilds($a, $b) } @{$builds2}];
+
     my $ret = {
         stillSucceed => [],
         stillFail => [],