diff --git a/src/bayesvalidrox/post_processing/post_processing.py b/src/bayesvalidrox/post_processing/post_processing.py
index adf8720a908806418c7d8b4da8ae1fbbbcb9c67e..63ead63fa397d1ce219978193887cccdccbdb96a 100644
--- a/src/bayesvalidrox/post_processing/post_processing.py
+++ b/src/bayesvalidrox/post_processing/post_processing.py
@@ -264,7 +264,7 @@ class PostProcessing:
                                                 squared=False,
                                                 multioutput='raw_values')
             # Validation error
-            self.valid_error[key] = (self.rmse[key]**2 / self.n_samples) / \
+            self.valid_error[key] = (self.rmse[key]**2) / \
                 np.var(outputs[key], ddof=1, axis=0)
 
             # Print a report table