diff --git a/release/models/optical-transport/openconfig-transport-types.yang b/release/models/optical-transport/openconfig-transport-types.yang
index 0d89384ac..34e2f8a65 100644
--- a/release/models/optical-transport/openconfig-transport-types.yang
+++ b/release/models/optical-transport/openconfig-transport-types.yang
@@ -866,7 +866,7 @@ module openconfig-transport-types {
     description
       "OTSI_A is the digital adaptation between the OTSi and the
       FlexO-x, or the regenerator section layer of the FlexO";
-    reference "ITU-T  G.798";
+    reference "ITU-T G.798";
   }
 
   identity PROT_ODUFLEX_GFP {