diff --git a/lib/Sabre/DAV/Directory.php b/lib/Sabre/DAV/Directory.php
index fc003867f5..d796f95cd2 100644
--- a/lib/Sabre/DAV/Directory.php
+++ b/lib/Sabre/DAV/Directory.php
@@ -36,7 +36,7 @@ public function getChild($name) {
                 if ($child->getName()==$name) return $child;
 
             }
-            throw new Sabre_DAV_FileNotFoundException('File not found');
+            throw new Sabre_DAV_FileNotFoundException('File not found: ' . $name);
 
         }
 
@@ -50,7 +50,7 @@ public function getChild($name) {
          */
         public function createFile($name, $data = null) {
 
-            throw new Sabre_DAV_PermissionDeniedException('Permission denied to create file');
+            throw new Sabre_DAV_PermissionDeniedException('Permission denied to create file (filename ' . $name . ')');
 
         }