2 files changed, 2 insertions, 2 deletions
diff --git a/lib/webrick/httpauth/digestauth.rb b/lib/webrick/httpauth/digestauth.rb
index 98bdbd10c7..375ec20154 100644
--- a/lib/webrick/httpauth/digestauth.rb
+++ b/lib/webrick/httpauth/digestauth.rb
@@ -111,7 +111,7 @@ module WEBrick
         @instance_key = hexdigest(self.__id__, Time.now.to_i, Process.pid)
         @opaques = {}
         @last_nonce_expire = Time.now
-        @mutex = Mutex.new
+        @mutex = Thread::Mutex.new
       end
 
       ##
diff --git a/lib/webrick/httpauth/htdigest.rb b/lib/webrick/httpauth/htdigest.rb
index 4bb25e1724..1ef4fdb4aa 100644
--- a/lib/webrick/httpauth/htdigest.rb
+++ b/lib/webrick/httpauth/htdigest.rb
@@ -38,7 +38,7 @@ module WEBrick
         @path = path
         @mtime = Time.at(0)
         @digest = Hash.new
-        @mutex = Mutex::new
+        @mutex = Thread::Mutex::new
         @auth_type = DigestAuth
         open(@path,"a").close unless File::exist?(@path)
         reload