diff --git a/src/PhpSpreadsheet/Calculation/Statistical.php b/src/PhpSpreadsheet/Calculation/Statistical.php
index 3bd14a9d..1df2cb1f 100644
--- a/src/PhpSpreadsheet/Calculation/Statistical.php
+++ b/src/PhpSpreadsheet/Calculation/Statistical.php
@@ -2329,7 +2329,7 @@ class Statistical
             if ($mValueCount == floor($mValueCount)) {
                 $returnValue = ($mArgs[$mValueCount--] + $mArgs[$mValueCount]) / 2;
             } else {
-                $mValueCount == floor($mValueCount);
+                $mValueCount = floor($mValueCount);
                 $returnValue = $mArgs[$mValueCount];
             }
         }