diff --git a/folly/io/async/test/AsyncUDPSocketTest.cpp b/folly/io/async/test/AsyncUDPSocketTest.cpp
index 632873c8cc2..a9412b0fadb 100644
--- a/folly/io/async/test/AsyncUDPSocketTest.cpp
+++ b/folly/io/async/test/AsyncUDPSocketTest.cpp
@@ -371,7 +371,7 @@ class UDPNotifyClient : public UDPClient {
 
     ssize_t ret = sock.recvmsg(&msg, 0);
     if (ret < 0) {
-      if (errno != EAGAIN || errno != EWOULDBLOCK) {
+      if (errno != EAGAIN && errno != EWOULDBLOCK) {
         onReadError(
             folly::AsyncSocketException(
                 folly::AsyncSocketException::NETWORK_ERROR, "error"));