diff --git a/include/openthread/backbone_router_ftd.h b/include/openthread/backbone_router_ftd.h
index 741aade2c..017c71b1f 100644
--- a/include/openthread/backbone_router_ftd.h
+++ b/include/openthread/backbone_router_ftd.h
@@ -351,12 +351,12 @@ void otBackboneRouterSetNdProxyCallback(otInstance *                    aInstanc
  * Represents the Backbone Router ND Proxy info.
  *
  */
-struct otBackboneRouterNdProxyInfo
+typedef struct otBackboneRouterNdProxyInfo
 {
     otIp6InterfaceIdentifier *mMeshLocalIid;             ///< Mesh-local IID
     uint32_t                  mTimeSinceLastTransaction; ///< Time since last transaction (Seconds)
     uint16_t                  mRloc16;                   ///< RLOC16
-};
+} otBackboneRouterNdProxyInfo;
 
 /**
  * This method gets the Backbone Router ND Proxy info.
diff --git a/include/openthread/instance.h b/include/openthread/instance.h
index 28eb327f1..379d9496f 100644
--- a/include/openthread/instance.h
+++ b/include/openthread/instance.h
@@ -53,7 +53,7 @@ extern "C" {
  * @note This number versions both OpenThread platform and user APIs.
  *
  */
-#define OPENTHREAD_API_VERSION (178)
+#define OPENTHREAD_API_VERSION (179)
 
 /**
  * @addtogroup api-instance