diff --git a/lib/cpp/Makefile.am b/lib/cpp/Makefile.am
index 82f2e3a..7f2d431 100755
--- a/lib/cpp/Makefile.am
+++ b/lib/cpp/Makefile.am
@@ -243,6 +243,7 @@
                      src/thrift/async/TAsyncProcessor.h \
                      src/thrift/async/TAsyncBufferProcessor.h \
                      src/thrift/async/TAsyncProtocolProcessor.h \
+                     src/thrift/async/TConcurrentClientSyncInfo.h \
                      src/thrift/async/TEvhttpClientChannel.h \
                      src/thrift/async/TEvhttpServer.h