diff --git a/src/comm/tcp_socket.cpp b/src/comm/tcp_socket.cpp
index 1b6eb1a6..8803664a 100644
--- a/src/comm/tcp_socket.cpp
+++ b/src/comm/tcp_socket.cpp
@@ -188,7 +188,7 @@ bool TCPSocket::read(uint8_t* buf, const size_t buf_len, size_t& read)
   }
   else if (res < 0)
   {
-    if (errno != EAGAIN && errno != EWOULDBLOCK)
+    if (!(errno == EAGAIN || errno == EWOULDBLOCK))
     {
       // any permanent error should be detected early
       state_ = SocketState::Disconnected;