diff --git a/src/schema/_scalar/ScalarValue.php b/src/schema/_scalar/ScalarValue.php
index e5ece81..80a307a 100644
--- a/src/schema/_scalar/ScalarValue.php
+++ b/src/schema/_scalar/ScalarValue.php
@@ -10,13 +10,13 @@ use nur\sery\schema\types\IType;
 use nur\sery\schema\Value;
 
 class ScalarValue extends Value {
-  function __construct(ScalarSchema $schema, &$dest=null, $destKey=null, bool $defaultVerifix=true, bool $defaultThrow=true) {
+  function __construct(ScalarSchema $schema, &$dest=null, $destKey=null, bool $defaultVerifix=true, ?bool $defaultThrow=null) {
     $this->schema = $schema;
     $this->defaultVerifix = $defaultVerifix;
-    $this->defaultThrow = false;
+    $this->defaultThrow = $defaultThrow !== null? $defaultThrow: false;
     $this->result = new ScalarResult();
     $this->reset($dest, $destKey);
-    $this->defaultThrow = $defaultThrow;
+    $this->defaultThrow = $defaultThrow !== null? $defaultThrow: true;
   }
 
   function isScalar(?ScalarValue &$scalar=null): bool { $scalar = $this; return true; }