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 c450642..cb1a1bd 100644
--- a/examples/single_chip/camera_web_server/main/app_httpd.c
+++ b/examples/single_chip/camera_web_server/main/app_httpd.c
@@ -424,7 +424,6 @@ static esp_err_t stream_handler(httpd_req_t *req){
                             }
                             if(!fmt2jpg(image_matrix->item, fb->width*fb->height*3, fb->width, fb->height, PIXFORMAT_RGB888, 90, &_jpg_buf, &_jpg_buf_len)){
                                 ESP_LOGE(TAG, "fmt2jpg failed");
-                                res = ESP_FAIL;
                             }
                             esp_camera_fb_return(fb);
                             fb = NULL;
diff --git a/examples/single_chip/recognition_solution/main/app_httpserver.c b/examples/single_chip/recognition_solution/main/app_httpserver.c
index 5252bc9..0d021d8 100644
--- a/examples/single_chip/recognition_solution/main/app_httpserver.c
+++ b/examples/single_chip/recognition_solution/main/app_httpserver.c
@@ -292,7 +292,6 @@ esp_err_t facenet_stream_handler(httpd_req_t *req)
             if(!fmt2jpg(image_matrix->item, fb->width*fb->height*3, fb->width, fb->height, PIXFORMAT_RGB888, 90, &_jpg_buf, &_jpg_buf_len))
             {
                 ESP_LOGE(TAG, "fmt2jpg failed");
-                res = ESP_FAIL;
             }
             esp_camera_fb_return(fb);
             fb = NULL;