diff --git a/machine_learning/scoring_functions.py b/machine_learning/scoring_functions.py
index a401df139748..08b969a95c3b 100755
--- a/machine_learning/scoring_functions.py
+++ b/machine_learning/scoring_functions.py
@@ -135,3 +135,7 @@ def mbd(predict, actual):
     score = float(numerator) / denumerator * 100
 
     return score
+
+
+def manual_accuracy(predict, actual):
+    return np.mean(np.array(actual) == np.array(predict))