diff --git a/components/esp_websocket_client/esp_websocket_client.c b/components/esp_websocket_client/esp_websocket_client.c
index a066c288c..cc77267d0 100644
--- a/components/esp_websocket_client/esp_websocket_client.c
+++ b/components/esp_websocket_client/esp_websocket_client.c
@@ -92,7 +92,7 @@ struct esp_websocket_client {
     int                         buffer_size;
 };
 
-static uint64_t _tick_get_ms()
+static uint64_t _tick_get_ms(void)
 {
     return esp_timer_get_time()/1000;
 }
diff --git a/examples/protocols/websocket/main/websocket_example.c b/examples/protocols/websocket/main/websocket_example.c
index 120a5b4fd..6b64ef25d 100644
--- a/examples/protocols/websocket/main/websocket_example.c
+++ b/examples/protocols/websocket/main/websocket_example.c
@@ -80,7 +80,7 @@ static void websocket_app_start(void)
     esp_websocket_client_destroy(client);
 }
 
-void app_main()
+void app_main(void)
 {
     ESP_LOGI(TAG, "[APP] Startup..");
     ESP_LOGI(TAG, "[APP] Free memory: %d bytes", esp_get_free_heap_size());