1 files changed, 5 insertions, 1 deletions
diff --git a/lib.php b/lib.php
index 6ff39db..d04ca45 100644
--- a/lib.php
+++ b/lib.php
@@ -485,7 +485,11 @@ S;
         $newdata = array();
         foreach ($data as $duration => $count) {
             if (false !== strpos($duration, 'hour')) {
-                $newdata['60 minutes'] += $count;
+                if (!array_key_exists('20 minutes', $newdata)) {
+                    $newdata['60 minutes'] = $count;
+                } else {
+                    $newdata['60 minutes'] += $count;
+                }
             } else {
                 $d = explode(' ', $duration);
                 if ($d[0] >= 20 && $d[1] == "minutes") {