diff --git a/src/Core/Config.php b/src/Core/Config.php
index 93cb26657..b686b63e5 100644
--- a/src/Core/Config.php
+++ b/src/Core/Config.php
@@ -110,7 +110,7 @@ class Config extends BaseObject
 	 * @param string $key    The configuration key to set
 	 * @param mixed  $value  The value to store
 	 *
-	 * @return mixed Stored $value or false if the database update failed
+	 * @return bool Operation success
 	 */
 	public static function set($family, $key, $value)
 	{
diff --git a/src/Core/Config/IConfigAdapter.php b/src/Core/Config/IConfigAdapter.php
index d1bb60033..4bd8eac26 100644
--- a/src/Core/Config/IConfigAdapter.php
+++ b/src/Core/Config/IConfigAdapter.php
@@ -53,7 +53,7 @@ interface IConfigAdapter
 	 * @param string $key    The configuration key to set
 	 * @param mixed  $value  The value to store
 	 *
-	 * @return mixed Stored $value or false if the database update failed
+	 * @return bool Operation success
 	 */
 	public function set($cat, $k, $value);
 
diff --git a/src/Core/Config/IPConfigAdapter.php b/src/Core/Config/IPConfigAdapter.php
index a0f0c9a94..b91241843 100644
--- a/src/Core/Config/IPConfigAdapter.php
+++ b/src/Core/Config/IPConfigAdapter.php
@@ -57,7 +57,7 @@ interface IPConfigAdapter
 	 * @param string $k     The configuration key to set
 	 * @param string $value The value to store
 	 *
-	 * @return mixed Stored $value or false
+	 * @return bool Operation success
 	 */
 	public function set($uid, $cat, $k, $value);
 
diff --git a/src/Core/Config/JITConfigAdapter.php b/src/Core/Config/JITConfigAdapter.php
index c03a010cd..96e4305ea 100644
--- a/src/Core/Config/JITConfigAdapter.php
+++ b/src/Core/Config/JITConfigAdapter.php
@@ -112,7 +112,6 @@ class JITConfigAdapter extends BaseObject implements IConfigAdapter
 
 		if ($result) {
 			$this->in_db[$cat][$k] = true;
-			return $value;
 		}
 
 		return $result;
diff --git a/src/Core/Config/JITPConfigAdapter.php b/src/Core/Config/JITPConfigAdapter.php
index ce9c5b646..ffd807a36 100644
--- a/src/Core/Config/JITPConfigAdapter.php
+++ b/src/Core/Config/JITPConfigAdapter.php
@@ -98,7 +98,6 @@ class JITPConfigAdapter extends BaseObject implements IPConfigAdapter
 
 		if ($result) {
 			$this->in_db[$uid][$cat][$k] = true;
-			return $value;
 		}
 
 		return $result;
diff --git a/src/Core/PConfig.php b/src/Core/PConfig.php
index aa5f75abe..e8b5c6ca5 100644
--- a/src/Core/PConfig.php
+++ b/src/Core/PConfig.php
@@ -107,7 +107,7 @@ class PConfig extends BaseObject
 	 * @param string $key    The configuration key to set
 	 * @param string $value  The value to store
 	 *
-	 * @return mixed Stored $value or false
+	 * @return bool Operation success
 	 */
 	public static function set($uid, $family, $key, $value)
 	{