diff --git a/tsfresh/utilities/distribution.py b/tsfresh/utilities/distribution.py
index 66ac692b..f2f7ec41 100644
--- a/tsfresh/utilities/distribution.py
+++ b/tsfresh/utilities/distribution.py
@@ -8,6 +8,7 @@
 Design of this module by Nils Braun
 """
 
+from numba import jit
 import itertools
 import math
 import warnings
@@ -170,6 +171,7 @@ def calculate_best_chunk_size(self, data_length):
             chunk_size += 1
         return chunk_size
 
+    @jit
     def map_reduce(
         self,
         map_function,