diff --git a/timm/utils/metrics.py b/timm/utils/metrics.py
index 8e0b1f99..9fdbe13e 100644
--- a/timm/utils/metrics.py
+++ b/timm/utils/metrics.py
@@ -24,9 +24,9 @@ class AverageMeter:
 
 def accuracy(output, target, topk=(1,)):
     """Computes the accuracy over the k top predictions for the specified values of k"""
-    maxk = max(topk)
+    maxk = min(max(topk), output.size()[1])
     batch_size = target.size(0)
     _, pred = output.topk(maxk, 1, True, True)
     pred = pred.t()
     correct = pred.eq(target.reshape(1, -1).expand_as(pred))
-    return [correct[:k].reshape(-1).float().sum(0) * 100. / batch_size for k in topk]
+    return [correct[:min(k, maxk)].reshape(-1).float().sum(0) * 100. / batch_size for k in topk]