diff --git a/iocore/net/NetEvent.h b/iocore/net/NetEvent.h
index 94e96fedda9..f00c3f4607d 100644
--- a/iocore/net/NetEvent.h
+++ b/iocore/net/NetEvent.h
@@ -84,10 +84,12 @@ class NetEvent
   LINK(NetEvent, keep_alive_queue_link);
   LINK(NetEvent, active_queue_link);
 
+  /// Values for @a f.shutdown
+  static constexpr unsigned SHUTDOWN_READ  = 1;
+  static constexpr unsigned SHUTDOWN_WRITE = 2;
+
   union {
     unsigned int flags = 0;
-#define NET_VC_SHUTDOWN_READ 1
-#define NET_VC_SHUTDOWN_WRITE 2
     struct {
       unsigned int got_local_addr : 1;
       unsigned int shutdown : 2;
diff --git a/iocore/net/UnixNetVConnection.cc b/iocore/net/UnixNetVConnection.cc
index d73119d63e4..126c3129cab 100644
--- a/iocore/net/UnixNetVConnection.cc
+++ b/iocore/net/UnixNetVConnection.cc
@@ -698,7 +698,7 @@ UnixNetVConnection::do_io_shutdown(ShutdownHowTo_t howto)
     read.vio.buffer.clear();
     read.vio.nbytes = 0;
     read.vio.cont   = nullptr;
-    f.shutdown |= NET_VC_SHUTDOWN_READ;
+    f.shutdown |= NetEvent::SHUTDOWN_READ;
     break;
   case IO_SHUTDOWN_WRITE:
     socketManager.shutdown((this)->con.fd, 1);
@@ -706,7 +706,7 @@ UnixNetVConnection::do_io_shutdown(ShutdownHowTo_t howto)
     write.vio.buffer.clear();
     write.vio.nbytes = 0;
     write.vio.cont   = nullptr;
-    f.shutdown |= NET_VC_SHUTDOWN_WRITE;
+    f.shutdown |= NetEvent::SHUTDOWN_WRITE;
     break;
   case IO_SHUTDOWN_READWRITE:
     socketManager.shutdown((this)->con.fd, 2);
@@ -718,7 +718,7 @@ UnixNetVConnection::do_io_shutdown(ShutdownHowTo_t howto)
     write.vio.nbytes = 0;
     read.vio.cont    = nullptr;
     write.vio.cont   = nullptr;
-    f.shutdown       = NET_VC_SHUTDOWN_READ | NET_VC_SHUTDOWN_WRITE;
+    f.shutdown       = NetEvent::SHUTDOWN_READ | NetEvent::SHUTDOWN_WRITE;
     break;
   default:
     ink_assert(!"not reached");
@@ -1154,14 +1154,14 @@ UnixNetVConnection::mainEvent(int event, Event *e)
     return EVENT_DONE;
   }
 
-  if (read.vio.op == VIO::READ && !(f.shutdown & NET_VC_SHUTDOWN_READ)) {
+  if (read.vio.op == VIO::READ && !(f.shutdown & NetEvent::SHUTDOWN_READ)) {
     reader_cont = read.vio.cont;
     if (read_signal_and_update(signal_event, this) == EVENT_DONE) {
       return EVENT_DONE;
     }
   }
 
-  if (!*signal_timeout_at && !closed && write.vio.op == VIO::WRITE && !(f.shutdown & NET_VC_SHUTDOWN_WRITE) &&
+  if (!*signal_timeout_at && !closed && write.vio.op == VIO::WRITE && !(f.shutdown & NetEvent::SHUTDOWN_WRITE) &&
       reader_cont != write.vio.cont && writer_cont == write.vio.cont) {
     if (write_signal_and_update(signal_event, this) == EVENT_DONE) {
       return EVENT_DONE;