diff --git a/lib/cpp/src/thrift/transport/TPipeServer.cpp b/lib/cpp/src/thrift/transport/TPipeServer.cpp
index 3a97dda..1f829a5 100644
--- a/lib/cpp/src/thrift/transport/TPipeServer.cpp
+++ b/lib/cpp/src/thrift/transport/TPipeServer.cpp
@@ -257,7 +257,6 @@
   InitializeSecurityDescriptor(&sd,SECURITY_DESCRIPTOR_REVISION);
   SetSecurityDescriptorDacl(&sd, true, NULL, false);
   sa.lpSecurityDescriptor = &sd;
-  sa.lpSecurityDescriptor = NULL;
   sa.nLength = sizeof(SECURITY_ATTRIBUTES);
   sa.bInheritHandle = true; //allow passing handle to child