diff --git a/src/Reader/Extension/Syndication/Feed.php b/src/Reader/Extension/Syndication/Feed.php
index 219f55d0..2d7fb40d 100644
--- a/src/Reader/Extension/Syndication/Feed.php
+++ b/src/Reader/Extension/Syndication/Feed.php
@@ -84,13 +84,15 @@ public function getUpdateFrequencyAsTicks()
         $ticks = 1;
 
         switch ($period) {
-            //intentional fall through
             case 'yearly':
                 $ticks *= 52; //TODO: fix generalisation, how?
+                // no break
             case 'weekly':
                 $ticks *= 7;
+                // no break
             case 'daily':
                 $ticks *= 24;
+                // no break
             case 'hourly':
                 $ticks *= 3600;
                 break;