diff --git a/src/sonic-yang-models/yang-models/sonic-types.yang b/src/sonic-yang-models/yang-models/sonic-types.yang
index ac3ceb805ff2..7bc9372536e8 100644
--- a/src/sonic-yang-models/yang-models/sonic-types.yang
+++ b/src/sonic-yang-models/yang-models/sonic-types.yang
@@ -129,7 +129,7 @@ module sonic-types {
             enum UDP;
         }
     }
-    
+
     typedef interface_type {
         type enumeration {
             enum CR;
@@ -151,6 +151,7 @@ module sonic-types {
             enum XAUI;
             enum XFI;
             enum XGMII;
+            enum none;
         }
     }
 
@@ -167,7 +168,7 @@ module sonic-types {
     }
     typedef meter_type {
         type enumeration {
-            enum packets; 
+            enum packets;
             enum bytes;
         }
     }
@@ -183,5 +184,5 @@ module sonic-types {
             enum deny;
             enum transit;
         }
-    }        
+    }
 }