diff --git a/eval.py b/eval.py
index 1aada5e..c727510 100644
--- a/eval.py
+++ b/eval.py
@@ -23,4 +23,4 @@ def eval_net(net, dataset, gpu=False):
         mask_pred = (mask_pred > 0.5).float()
 
         tot += dice_coeff(mask_pred, true_mask).item()
-    return tot / i
+    return tot / (i + 1)