1 files changed, 5 insertions, 1 deletions
diff --git a/sabre/vobject/lib/Property/ICalendar/CalAddress.php b/sabre/vobject/lib/Property/ICalendar/CalAddress.php
index 2dbbc6ea..c90967d7 100644
--- a/sabre/vobject/lib/Property/ICalendar/CalAddress.php
+++ b/sabre/vobject/lib/Property/ICalendar/CalAddress.php
@@ -53,7 +53,11 @@ class CalAddress extends Text
             return $input;
         }
         list($schema, $everythingElse) = explode(':', $input, 2);
+        $schema = strtolower($schema);
+        if ('mailto' === $schema) {
+            $everythingElse = strtolower($everythingElse);
+        }
 
-        return strtolower($schema).':'.$everythingElse;
+        return $schema.':'.$everythingElse;
     }
 }