diff --git a/components/esp_wifi/include/esp_wifi.h b/components/esp_wifi/include/esp_wifi.h
index df43eec32e..35164c5565 100644
--- a/components/esp_wifi/include/esp_wifi.h
+++ b/components/esp_wifi/include/esp_wifi.h
@@ -504,6 +504,7 @@ esp_err_t esp_wifi_scan_start(const wifi_scan_config_t *config, bool block);
   *    - ESP_OK: succeed
   *    - ESP_ERR_WIFI_NOT_INIT: WiFi is not initialized by esp_wifi_init
   *    - ESP_ERR_WIFI_NOT_STARTED: WiFi is not started by esp_wifi_start
+  *    - ESP_ERR_WIFI_STATE: WiFi is still connecting when esp_wifi_scan_stop() is invoked.
   */
 esp_err_t esp_wifi_scan_stop(void);
 
diff --git a/components/esp_wifi/lib b/components/esp_wifi/lib
index 83c236e25f..91d5b0cfcb 160000
--- a/components/esp_wifi/lib
+++ b/components/esp_wifi/lib
@@ -1 +1 @@
-Subproject commit 83c236e25f418d58b5e05bbac7409a9c9449ea24
+Subproject commit 91d5b0cfcb4051ed895100b3fcd159f5d802dc28