diff --git a/src/EthernetClient.cpp b/src/EthernetClient.cpp
index 5a20c748..7d12b21d 100644
--- a/src/EthernetClient.cpp
+++ b/src/EthernetClient.cpp
@@ -83,7 +83,7 @@ size_t EthernetClient::write(uint8_t b)
 size_t EthernetClient::write(const uint8_t *buf, size_t size)
 {
 	if (_sockindex >= MAX_SOCK_NUM) return 0;
-	if (Ethernet.socketSend(_sockindex, buf, size)) return size;
+	if (size=Ethernet.socketSend(_sockindex, buf, size)) return size;
 	setWriteError();
 	return 0;
 }