diff --git a/library/Icinga/Protocol/File/Exception/FileReaderException.php b/library/Icinga/Protocol/File/Exception/FileReaderException.php
index 3e0890a57..a7db5d701 100644
--- a/library/Icinga/Protocol/File/Exception/FileReaderException.php
+++ b/library/Icinga/Protocol/File/Exception/FileReaderException.php
@@ -2,9 +2,9 @@
 
 namespace Icinga\Protocol\File;
 
-use RuntimeException;
+use Icinga\Exception\IcingaException;
 
 /**
  * Exception thrown if a file reader specific error occurs
  */
-class FileReaderException extends RuntimeException {}
+class FileReaderException extends IcingaException {}
diff --git a/library/Icinga/Protocol/File/Reader.php b/library/Icinga/Protocol/File/Reader.php
index 50842bc4a..651846b58 100644
--- a/library/Icinga/Protocol/File/Reader.php
+++ b/library/Icinga/Protocol/File/Reader.php
@@ -40,7 +40,7 @@ class Reader extends FilterIterator
     {
         foreach (array('filename', 'fields') as $key) {
             if (! isset($config->{$key})) {
-                throw new FileReaderException('The directive `' . $key . '\' is required');
+                throw new FileReaderException('The directive `%s\' is required', $key);
             }
         }
         $this->fields = $config->fields;