diff --git a/encoding/utils/metrics.py b/encoding/utils/metrics.py
index f14ecc9c..4e08d672 100644
--- a/encoding/utils/metrics.py
+++ b/encoding/utils/metrics.py
@@ -24,11 +24,11 @@ def accuracy(output, target, topk=(1,)):
 
         _, pred = output.topk(maxk, 1, True, True)
         pred = pred.t()
-        correct = pred.eq(target.view(1, -1).expand_as(pred))
+        correct = pred.eq(target.reshape(1, -1).expand_as(pred))
 
         res = []
         for k in topk:
-            correct_k = correct[:k].view(-1).float().sum(0, keepdim=True)
+            correct_k = correct[:k].reshape(-1).float().sum(0, keepdim=True)
             res.append(correct_k.mul_(100.0 / batch_size))
         return res
 
@@ -37,6 +37,12 @@ def get_pixacc_miou(total_correct, total_label, total_inter, total_union):
     IoU = 1.0 * total_inter / (np.spacing(1) + total_union)
     mIoU = IoU.mean()
     return pixAcc, mIoU
+
+def get_pixacc_miou(total_correct, total_label, total_inter, total_union):
+    pixAcc = 1.0 * total_correct / (np.spacing(1) + total_label)
+    IoU = 1.0 * total_inter / (np.spacing(1) + total_union)
+    mIoU = IoU.mean()
+    return pixAcc, mIoU
     
 
 class SegmentationMetric(object):
diff --git a/scripts/prepare_minc.py b/scripts/prepare_minc.py
index fc37d91e..5d447e8f 100644
--- a/scripts/prepare_minc.py
+++ b/scripts/prepare_minc.py
@@ -20,7 +20,7 @@ def parse_args():
 
 def download_minc(path, overwrite=False):
     _AUG_DOWNLOAD_URLS = [
-        ('http://opensurfaces.cs.cornell.edu/static/minc/minc-2500.tar.gz', 'bcccbb3b1ab396ef540f024a5ba23eff54f7fe31')]
+        ('https://web.archive.org/web/20190605124855/http://opensurfaces.cs.cornell.edu/static/minc/minc-2500.tar.gz', 'bcccbb3b1ab396ef540f024a5ba23eff54f7fe31')]
     download_dir = os.path.join(path, 'downloads')
     mkdir(download_dir)
     for url, checksum in _AUG_DOWNLOAD_URLS: