diff --git a/utils/utils.py b/utils/utils.py
index 7c4c0c81..1fb30c08 100755
--- a/utils/utils.py
+++ b/utils/utils.py
@@ -53,11 +53,14 @@ def coco_class_weights():  # frequency of each class in coco train2014
     return weights
 
 
-def coco80_to_coco91_class():  # returns the coco class for each darknet class
+def coco80_to_coco91_class():  # converts 80-index (val2014) to 91-index (paper)
     # https://tech.amikelive.com/node-718/what-object-categories-labels-are-in-coco-dataset/
-    a = np.loadtxt('data/coco.names', dtype='str', delimiter='\n')
-    b = np.loadtxt('data/coco_paper.names', dtype='str', delimiter='\n')
-    x = [list(a[i] == b).index(True) + 1 for i in range(80)]  # darknet to coco
+    # a = np.loadtxt('data/coco.names', dtype='str', delimiter='\n')
+    # b = np.loadtxt('data/coco_paper.names', dtype='str', delimiter='\n')
+    # x = [list(a[i] == b).index(True) + 1 for i in range(80)]  # darknet to coco
+    x = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 27, 28, 31, 32, 33, 34,
+         35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63,
+         64, 65, 67, 70, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 84, 85, 86, 87, 88, 89, 90]
     return x