diff --git a/examples/single_chip/camera_web_server/main/app_httpd.c b/examples/single_chip/camera_web_server/main/app_httpd.c
index fd5145f..3e9273f 100644
--- a/examples/single_chip/camera_web_server/main/app_httpd.c
+++ b/examples/single_chip/camera_web_server/main/app_httpd.c
@@ -648,10 +648,16 @@ static esp_err_t index_handler(httpd_req_t *req){
     httpd_resp_set_type(req, "text/html");
     httpd_resp_set_hdr(req, "Content-Encoding", "gzip");
     sensor_t * s = esp_camera_sensor_get();
-    if (s->id.PID == OV3660_PID) {
-        return httpd_resp_send(req, (const char *)index_ov3660_html_gz_start, index_ov3660_html_gz_len);
+    if (s != NULL) {
+        if (s->id.PID == OV3660_PID) {
+            return httpd_resp_send(req, (const char *)index_ov3660_html_gz_start, index_ov3660_html_gz_len);
+        } else {
+            return httpd_resp_send(req, (const char *)index_ov2640_html_gz_start, index_ov2640_html_gz_len);
+        }
+    } else {
+        ESP_LOGE(TAG,"Camera sensor not found");
+        return httpd_resp_send_500(req);
     }
-    return httpd_resp_send(req, (const char *)index_ov2640_html_gz_start, index_ov2640_html_gz_len);
 }
 
 void app_httpd_main(){