diff --git a/8- Training a neural network: Implementing back propagation from scratch/code/mlp.py b/8- Training a neural network: Implementing back propagation from scratch/code/mlp.py
index d3f323a..72bed37 100644
--- a/8- Training a neural network: Implementing back propagation from scratch/code/mlp.py	
+++ b/8- Training a neural network: Implementing back propagation from scratch/code/mlp.py	
@@ -139,7 +139,7 @@ def train(self, inputs, targets, epochs, learning_rate):
                 sum_errors += self._mse(target, output)
 
             # Epoch complete, report the training error
-            print("Error: {} at epoch {}".format(sum_errors / len(items), i+1))
+            print("Error: {} at epoch {}".format(sum_errors / len(inputs), i+1))
 
         print("Training complete!")
         print("=====")