diff --git a/Math/Topology/KernelsND.php b/Math/Topology/KernelsND.php
index 9fbdfcfcb..483ac2b60 100644
--- a/Math/Topology/KernelsND.php
+++ b/Math/Topology/KernelsND.php
@@ -58,7 +58,7 @@ final class KernelsND
         $cov = $bandwithMatrix->mult($identityMatrix);
 
         /** @phpstan-ignore-next-line */
-        $exponent = $distnaceMatrix->dot($cov->inverse())->mult($distnaceMatrix)->sum(1)->mult(-0.5);
+        $exponent = $distnaceMatrix->mult($cov->inverse())->mult($distnaceMatrix)->sum(1)->mult(-0.5);
 
         return $exponent->exp()->mult((1 / \pow(2 * \M_PI, $dim / 2)) * \pow($cov->det(), 0.5))->matrix;
     }