diff --git a/rocketpy/simulation/monte_carlo.py b/rocketpy/simulation/monte_carlo.py
index 7f6689599..16b47c64c 100644
--- a/rocketpy/simulation/monte_carlo.py
+++ b/rocketpy/simulation/monte_carlo.py
@@ -722,12 +722,17 @@ def set_processed_results(self):
             try:
                 mean = np.mean(values)
                 stdev = np.std(values)
+                self.processed_results[result] = (mean, stdev)
                 pi_low = np.quantile(values, 0.025)
                 pi_high = np.quantile(values, 0.975)
                 median = np.median(values)
-                self.processed_results[result] = (mean, median, stdev, pi_low, pi_high)
             except TypeError:
-                self.processed_results[result] = (None, None, None, None, None)
+                mean = None
+                stdev = None
+                pi_low = None
+                pi_high = None
+                median = None
+            self.processed_results[result] = (mean, median, stdev, pi_low, pi_high)
 
     # Import methods