diff --git a/src/net/SocketError.hxx b/src/net/SocketError.hxx
index 682a8911f..de81073e8 100644
--- a/src/net/SocketError.hxx
+++ b/src/net/SocketError.hxx
@@ -172,6 +172,13 @@ IsSocketError(const std::system_error &e) noexcept
 	return e.code().category() == SocketErrorCategory();
 }
 
+[[gnu::pure]]
+static inline bool
+IsSocketError(const std::system_error &e, socket_error_t code) noexcept
+{
+	return IsSocketError(e) && e.code().value() == code;
+}
+
 [[gnu::pure]]
 static inline bool
 IsSocketErrorReceiveWouldBlock(const std::system_error &e) noexcept