use chrono
diff --git a/lib/cpp/Makefile.am b/lib/cpp/Makefile.am
index de0c058..db9d751 100755
--- a/lib/cpp/Makefile.am
+++ b/lib/cpp/Makefile.am
@@ -67,7 +67,6 @@
                        src/thrift/async/TConcurrentClientSyncInfo.cpp \
                        src/thrift/concurrency/ThreadManager.cpp \
                        src/thrift/concurrency/TimerManager.cpp \
-                       src/thrift/concurrency/Util.cpp \
                        src/thrift/processor/PeekProcessor.cpp \
                        src/thrift/protocol/TDebugProtocol.cpp \
                        src/thrift/protocol/TJSONProtocol.cpp \
@@ -155,8 +154,7 @@
                          src/thrift/concurrency/Thread.h \
                          src/thrift/concurrency/ThreadManager.h \
                          src/thrift/concurrency/TimerManager.h \
-                         src/thrift/concurrency/FunctionRunner.h \
-                         src/thrift/concurrency/Util.h
+                         src/thrift/concurrency/FunctionRunner.h
 
 include_protocoldir = $(include_thriftdir)/protocol
 include_protocol_HEADERS = \