diff --git a/lib/cpp/src/thrift/transport/TPipeServer.cpp b/lib/cpp/src/thrift/transport/TPipeServer.cpp
index 1f829a5..f4d4704 100644
--- a/lib/cpp/src/thrift/transport/TPipeServer.cpp
+++ b/lib/cpp/src/thrift/transport/TPipeServer.cpp
@@ -53,11 +53,11 @@
   bufsize_(bufsize),
   Pipe_(INVALID_HANDLE_VALUE),
   isAnonymous(false)
- {  //Restrict maxconns_ to 1-255
+ {  //Restrict maxconns_ to 1-PIPE_UNLIMITED_INSTANCES
     if(maxconnections == 0)
       maxconns_ = 1;
-    else if (maxconnections > 255)
-      maxconns_ = 255;
+    else if (maxconnections > PIPE_UNLIMITED_INSTANCES)
+      maxconns_ = PIPE_UNLIMITED_INSTANCES;
 	else
       maxconns_ = maxconnections;