diff --git a/src/vnm/AddressRange.cc b/src/vnm/AddressRange.cc
index 1ef5c04ff1..786419314b 100644
--- a/src/vnm/AddressRange.cc
+++ b/src/vnm/AddressRange.cc
@@ -1019,7 +1019,7 @@ int AddressRange::ip6_to_s(const unsigned int prefix[],
     struct in6_addr ip6;
     char dst[INET6_ADDRSTRLEN];
 
-    eui64[1] = ((mac[1]+512)<<16) + ((mlow & 0xFF000000)>>16) + 0x000000FF;
+    eui64[1] = ((mac[1]^0x0200)<<16) + ((mlow & 0xFF000000)>>16) + 0x000000FF;
     eui64[0] = 4261412864 + (mlow & 0x00FFFFFF);
 
     ip6.s6_addr32[2] = htonl(eui64[1]);