diff --git a/utils/datasets.py b/utils/datasets.py
index b042c3af..abf184a9 100755
--- a/utils/datasets.py
+++ b/utils/datasets.py
@@ -405,10 +405,11 @@ def letterbox(img, new_shape=416, color=(128, 128, 128), mode='auto'):
         new_unpad = (new_shape, new_shape)
         ratiow, ratioh = new_shape / shape[1], new_shape / shape[0]
 
+    if shape[::-1] != new_unpad:
+        img = cv2.resize(img, new_unpad, interpolation=cv2.INTER_AREA)  # resize
     top, bottom = int(round(dh - 0.1)), int(round(dh + 0.1))
     left, right = int(round(dw - 0.1)), int(round(dw + 0.1))
-    img = cv2.resize(img, new_unpad, interpolation=cv2.INTER_AREA)  # resized, no border
-    img = cv2.copyMakeBorder(img, top, bottom, left, right, cv2.BORDER_CONSTANT, value=color)  # padded square
+    img = cv2.copyMakeBorder(img, top, bottom, left, right, cv2.BORDER_CONSTANT, value=color)  # add border
     return img, ratiow, ratioh, dw, dh