diff --git a/detect.py b/detect.py
index 09bb7311..3b2d17ea 100644
--- a/detect.py
+++ b/detect.py
@@ -167,7 +167,7 @@ if __name__ == '__main__':
     parser.add_argument('--half', action='store_true', help='half precision FP16 inference')
     parser.add_argument('--device', default='', help='device id (i.e. 0 or 0,1) or cpu')
     parser.add_argument('--view-img', action='store_true', help='display results')
-    parser.add_argument('--save-txt', action='store_true', help='display results')
+    parser.add_argument('--save-txt', action='store_true', help='save results to *.txt')
     parser.add_argument('--classes', nargs='+', type=int, help='filter by class')
     parser.add_argument('--agnostic-nms', action='store_true', help='class-agnostic NMS')
     opt = parser.parse_args()
diff --git a/utils/utils.py b/utils/utils.py
index 5647702e..51d4127b 100755
--- a/utils/utils.py
+++ b/utils/utils.py
@@ -830,7 +830,7 @@ def print_mutation(hyp, results, bucket=''):
 
 def apply_classifier(x, model, img, im0):
     # applies a second stage classifier to yolo outputs
-
+    im0 = [im0] if isinstance(im0, np.ndarray) else im0
     for i, d in enumerate(x):  # per image
         if d is not None and len(d):
             d = d.clone()