diff --git a/library/Icinga/Application/Modules/Module.php b/library/Icinga/Application/Modules/Module.php
index de40266e1..70420cc9b 100644
--- a/library/Icinga/Application/Modules/Module.php
+++ b/library/Icinga/Application/Modules/Module.php
@@ -1251,7 +1251,7 @@ class Module
      *
      * @return  $this
      *
-     * @deprecated              Deprecated in favor of {@link provideHook()}. Will be removed in version 2.2.0
+     * @deprecated              Deprecated since 2.1.1. Use {@link provideHook()} instead
      */
     protected function registerHook($name, $class, $key = null)
     {
@@ -1272,15 +1272,14 @@ class Module
      * Provide a hook implementation
      *
      * @param   string  $name           Name of the hook for which to provide an implementation
-     * @param   string  $implementation [optional] Fully qualified name of the class providing the hook implementation.
+     * @param   string  $implementation Fully qualified name of the class providing the hook implementation.
      *                                  Defaults to the module's ProvidedHook namespace plus the hook's name for the
-     *                                  class name. Web 2's namespace separator is \\ (double backslash) at the moment
-     * @param   string  $key            No-op arg for compatibility reasons. This argument is deprecated and will be
-     *                                  removed in version 2.2.0
+     *                                  class name
+     * @param   string  $deprecated     DEPRECATED - No-op arg for compatibility reasons
      *
      * @return  $this
      */
-    protected function provideHook($name, $implementation = null, $key = null)
+    protected function provideHook($name, $implementation = null, $deprecated = null)
     {
         if ($implementation === null) {
             $implementation = $name;