diff --git a/src/Phpml/Metric/Distance/Minkowski.php b/src/Phpml/Metric/Distance/Minkowski.php
index b8ec0ef..89273d6 100644
--- a/src/Phpml/Metric/Distance/Minkowski.php
+++ b/src/Phpml/Metric/Distance/Minkowski.php
@@ -36,7 +36,7 @@ class Minkowski implements Distance
             throw InvalidArgumentException::sizeNotMatch();
         }
 
-        $distance = 0;
+        $distance = 1;
         $count = count($a);
 
         for ($i = 0; $i < $count; ++$i) {