diff --git a/lib/public/config.php b/lib/public/config.php
index 57c430251b..05a3f651b3 100644
--- a/lib/public/config.php
+++ b/lib/public/config.php
@@ -90,6 +90,7 @@ class Config {
 	 * @param string $key key
 	 * @param string $default = null, default value if the key does not exist
 	 * @return string the value or $default
+	 * @deprecated use method getAppValue of \OCP\IConfig
 	 *
 	 * This function gets a value from the appconfig table. If the key does
 	 * not exist the default value will be returned
@@ -104,6 +105,7 @@ class Config {
 	 * @param string $key key
 	 * @param string $value value
 	 * @return boolean true/false
+	 * @deprecated use method setAppValue of \OCP\IConfig
 	 *
 	 * Sets a value. If the key did not exist before it will be created.
 	 */
@@ -123,6 +125,7 @@ class Config {
 	 * @param string $key key
 	 * @param string $default = null, default value if the key does not exist
 	 * @return string the value or $default
+	 * @deprecated use method getUserValue of \OCP\IConfig
 	 *
 	 * This function gets a value from the preferences table. If the key does
 	 * not exist the default value will be returned
@@ -138,6 +141,7 @@ class Config {
 	 * @param string $key key
 	 * @param string $value value
 	 * @return bool
+	 * @deprecated use method setUserValue of \OCP\IConfig
 	 *
 	 * Adds a value to the preferences. If the key did not exist before, it
 	 * will be added automagically.
diff --git a/lib/public/iappconfig.php b/lib/public/iappconfig.php
index d43eb70ee0..da4090d5e6 100644
--- a/lib/public/iappconfig.php
+++ b/lib/public/iappconfig.php
@@ -26,6 +26,7 @@ interface IAppConfig {
 	 * @param string $key key
 	 * @param string $default = null, default value if the key does not exist
 	 * @return string the value or $default
+	 * @deprecated use method getAppValue of \OCP\IConfig
 	 *
 	 * This function gets a value from the appconfig table. If the key does
 	 * not exist the default value will be returned
@@ -37,8 +38,7 @@ interface IAppConfig {
 	 * @param string $app app
 	 * @param string $key key
 	 * @return bool
-	 *
-	 * Deletes a key.
+	 * @deprecated use method deleteAppValue of \OCP\IConfig
 	 */
 	public function deleteKey($app, $key);
 
@@ -46,6 +46,7 @@ interface IAppConfig {
 	 * Get the available keys for an app
 	 * @param string $app the app we are looking for
 	 * @return array an array of key names
+	 * @deprecated use method getAppKeys of \OCP\IConfig
 	 *
 	 * This function gets all keys of an app. Please note that the values are
 	 * not returned.
@@ -66,6 +67,7 @@ interface IAppConfig {
 	 * @param string $app app
 	 * @param string $key key
 	 * @param string $value value
+	 * @deprecated use method setAppValue of \OCP\IConfig
 	 *
 	 * Sets a value. If the key did not exist before it will be created.
 	 * @return void