diff --git a/libraries/SocketWrapper/src/SocketHelpers.cpp b/libraries/SocketWrapper/src/SocketHelpers.cpp
index 25af983f3..c4f5fc5e7 100644
--- a/libraries/SocketWrapper/src/SocketHelpers.cpp
+++ b/libraries/SocketWrapper/src/SocketHelpers.cpp
@@ -5,7 +5,7 @@ uint8_t* arduino::MbedSocketClass::macAddress(uint8_t* mac) {
   for (int b = 0; b < 6; b++) {
     uint32_t tmp;
     sscanf(&mac_str[b * 2 + (b)], "%02x", (unsigned int*)&tmp);
-    mac[5 - b] = (uint8_t)tmp;
+    mac[b] = (uint8_t)tmp;
   }
   return mac;
 }