diff --git a/src/PhpSpreadsheet/Calculation/MathTrig.php b/src/PhpSpreadsheet/Calculation/MathTrig.php
index 1d104c18..9c6b60ec 100644
--- a/src/PhpSpreadsheet/Calculation/MathTrig.php
+++ b/src/PhpSpreadsheet/Calculation/MathTrig.php
@@ -673,8 +673,8 @@ class MathTrig
      */
     public static function MOD($a = 1, $b = 1)
     {
-        $a = Functions::flattenSingleValue($a);
-        $b = Functions::flattenSingleValue($b);
+        $a = (float) Functions::flattenSingleValue($a);
+        $b = (float) Functions::flattenSingleValue($b);
 
         if ($b == 0.0) {
             return Functions::DIV0();
diff --git a/tests/data/Calculation/MathTrig/MOD.php b/tests/data/Calculation/MathTrig/MOD.php
index e98e41a7..3aded00a 100644
--- a/tests/data/Calculation/MathTrig/MOD.php
+++ b/tests/data/Calculation/MathTrig/MOD.php
@@ -46,4 +46,9 @@ return [
         1.3,
         1.2,
     ],
+    [
+        '',
+        1,
+        0,
+    ],
 ];