1 files changed, 4 insertions, 4 deletions
diff --git a/lib/resolv.rb b/lib/resolv.rb
index 9a981b99bd..ca4c7581ba 100644
--- a/lib/resolv.rb
+++ b/lib/resolv.rb
@@ -180,7 +180,7 @@ class Resolv
 
     def initialize(filename = DefaultFileName)
       @filename = filename
-      @mutex = Mutex.new
+      @mutex = Thread::Mutex.new
       @initialized = nil
     end
 
@@ -334,7 +334,7 @@ class Resolv
     #                   :ndots => 1)
 
     def initialize(config_info=nil)
-      @mutex = Mutex.new
+      @mutex = Thread::Mutex.new
       @config = Config.new(config_info)
       @initialized = nil
     end
@@ -625,7 +625,7 @@ class Resolv
     end
 
     RequestID = {} # :nodoc:
-    RequestIDMutex = Mutex.new # :nodoc:
+    RequestIDMutex = Thread::Mutex.new # :nodoc:
 
     def self.allocate_request_id(host, port) # :nodoc:
       id = nil
@@ -910,7 +910,7 @@ class Resolv
 
     class Config # :nodoc:
       def initialize(config_info=nil)
-        @mutex = Mutex.new
+        @mutex = Thread::Mutex.new
         @config_info = config_info
         @initialized = nil
         @timeouts = nil