diff --git a/common/os_calls.c b/common/os_calls.c
index e551a6f7..2296180f 100644
--- a/common/os_calls.c
+++ b/common/os_calls.c
@@ -408,7 +408,7 @@ g_tcp_last_error_would_block(int sck)
 #if defined(_WIN32)
   return WSAGetLastError() == WSAEWOULDBLOCK;
 #else
-  return errno == EWOULDBLOCK;
+  return (errno == EWOULDBLOCK) || (errno == EINPROGRESS);
 #endif
 }