diff --git a/system/Common.php b/system/Common.php
index 70bc6105a39a..8df5ece73f75 100644
--- a/system/Common.php
+++ b/system/Common.php
@@ -782,7 +782,7 @@ function lang(string $line, array $args = [], ?string $locale = null)
      *  - info
      *  - debug
      *
-     * @return mixed
+     * @return bool
      */
     function log_message(string $level, string $message, array $context = [])
     {
diff --git a/system/Log/Handlers/ChromeLoggerHandler.php b/system/Log/Handlers/ChromeLoggerHandler.php
index 2ab019d8f6fc..b2c6d28fdfb4 100644
--- a/system/Log/Handlers/ChromeLoggerHandler.php
+++ b/system/Log/Handlers/ChromeLoggerHandler.php
@@ -128,7 +128,7 @@ public function handle($level, $message): bool
     /**
      * Converts the object to display nicely in the Chrome Logger UI.
      *
-     * @param mixed $object
+     * @param array|int|object|string $object
      *
      * @return array
      */
diff --git a/system/Log/Logger.php b/system/Log/Logger.php
index 515a065647ee..1bf578ba1a03 100644
--- a/system/Log/Logger.php
+++ b/system/Log/Logger.php
@@ -243,7 +243,7 @@ public function debug($message, array $context = []): bool
     /**
      * Logs with an arbitrary level.
      *
-     * @param mixed  $level
+     * @param string $level
      * @param string $message
      */
     public function log($level, $message, array $context = []): bool
@@ -312,9 +312,9 @@ public function log($level, $message, array $context = []): bool
      * {file}
      * {line}
      *
-     * @param mixed $message
+     * @param string $message
      *
-     * @return mixed
+     * @return string
      */
     protected function interpolate($message, array $context = [])
     {