diff --git a/libraries/ESP8266WiFi/src/ESP8266WiFiSTA.cpp b/libraries/ESP8266WiFi/src/ESP8266WiFiSTA.cpp
index b526f2043..1d7d22736 100644
--- a/libraries/ESP8266WiFi/src/ESP8266WiFiSTA.cpp
+++ b/libraries/ESP8266WiFi/src/ESP8266WiFiSTA.cpp
@@ -590,6 +590,12 @@ void wifi_wps_status_cb(wps_cb_status status) {
         case WPS_CB_ST_WEP:
             DEBUGV("wps WEP\n");
             break;
+        case WPS_CB_ST_UNK:
+            DEBUGV("wps UNKNOWN\n");
+            if(!wifi_wps_disable()) {
+                DEBUGV("wps disable failed\n");
+            }
+            break;
     }
     // TODO user function to get status
 
@@ -670,4 +676,3 @@ void ESP8266WiFiSTAClass::_smartConfigCallback(uint32_t st, void* result) {
         WiFi.stopSmartConfig();
     }
 }
-
diff --git a/tools/sdk/include/user_interface.h b/tools/sdk/include/user_interface.h
index f916afa45..f9195829c 100644
--- a/tools/sdk/include/user_interface.h
+++ b/tools/sdk/include/user_interface.h
@@ -481,6 +481,7 @@ enum wps_cb_status {
 	WPS_CB_ST_FAILED,
 	WPS_CB_ST_TIMEOUT,
 	WPS_CB_ST_WEP,
+	WPS_CB_ST_UNK,
 };
 
 bool wifi_wps_enable(WPS_TYPE_t wps_type);