diff --git a/Math/Functions/Functions.php b/Math/Functions/Functions.php
index c8332f253..9de4215b6 100644
--- a/Math/Functions/Functions.php
+++ b/Math/Functions/Functions.php
@@ -254,7 +254,7 @@ class Functions
      */
     public static function isEven($a) : bool
     {
-        return !($a & 1)
+        return !($a & 1);
     }
 
     /**