diff --git a/rb/lib/selenium/webdriver/common/manager.rb b/rb/lib/selenium/webdriver/common/manager.rb
index d080e0ead6ef7..99181d7700f67 100644
--- a/rb/lib/selenium/webdriver/common/manager.rb
+++ b/rb/lib/selenium/webdriver/common/manager.rb
@@ -65,7 +65,7 @@ def add_cookie(opts = {})
       # Get the cookie with the given name
       #
       # @param [String] name the name of the cookie
-      # @return [Hash, nil] the cookie, or throws a NoSuchCookieError if it wasn't found.
+      # @return [Hash] the cookie, or throws a NoSuchCookieError if it wasn't found.
       #
 
       def cookie_named(name)