diff --git a/lib/cpp/Makefile.am b/lib/cpp/Makefile.am
index 8192a22..7b879f3 100755
--- a/lib/cpp/Makefile.am
+++ b/lib/cpp/Makefile.am
@@ -141,6 +141,10 @@
                          src/thrift/concurrency/Monitor.h \
                          src/thrift/concurrency/PlatformThreadFactory.h \
                          src/thrift/concurrency/PosixThreadFactory.h \
+                         src/thrift/concurrency/StdMonitor.cpp \
+                         src/thrift/concurrency/StdMutex.cpp \
+                         src/thrift/concurrency/StdThreadFactory.cpp \
+                         src/thrift/concurrency/StdThreadFactory.h \
                          src/thrift/concurrency/Thread.h \
                          src/thrift/concurrency/ThreadManager.h \
                          src/thrift/concurrency/TimerManager.h \