diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index 3b248cc..6e6c25e 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -13,6 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# docker build -t xosproject/rcord-synchronizer:candidate -f Dockerfile.synchronizer .
 
 # xosproject/rcord-synchronizer
 FROM xosproject/xos-synchronizer-base:candidate
diff --git a/xos/synchronizer/models/rcord.xproto b/xos/synchronizer/models/rcord.xproto
index 62bbb0b..7a41dfa 100644
--- a/xos/synchronizer/models/rcord.xproto
+++ b/xos/synchronizer/models/rcord.xproto
@@ -24,6 +24,5 @@
 
     optional int32 uni_port_id = 16 [help_text = "UNI PORT ID in VOLTHA", null = True, db_index = False, blank = False];
     optional string ip_address = 17 [help_text = "Subscriber IP Address", null = False, db_index = False, blank = False];
-    optional string switch_datapath_id = 18 [help_text = "Fabric switch to which the OLT is connected", null = False, db_index = False, blank = False];
-
+    optional string mac_address = 18 [null = False, db_index = False, blank = False];
 }