diff --git a/src/Nella/Forms/DateTime/DateInput.php b/src/Nella/Forms/DateTime/DateInput.php
index 2c8652a..8e9a7a6 100644
--- a/src/Nella/Forms/DateTime/DateInput.php
+++ b/src/Nella/Forms/DateTime/DateInput.php
@@ -174,16 +174,18 @@ private function normalizeFormat($input)
 	 */
 	public function setRequired($message = TRUE)
 	{
-		if (!is_bool($message) && !is_string($message)) {
+		if ($message !== FALSE && !is_string($message)) {
 			throw new \Nette\InvalidArgumentException('Message must be string');
 		}
 
 		parent::setRequired($message);
 
-		$this->addCondition(Form::FILLED)
-			->addRule(function (DateInput $control) {
-				return $this->validateDate($control);
-			}, $message);
+		if ($message !== FALSE) {
+			$this->addCondition(Form::FILLED)
+				->addRule(function (DateInput $control) {
+					return $this->validateDate($control);
+				}, $message);
+		}
 
 		return $this;
 	}
diff --git a/src/Nella/Forms/DateTime/DateTimeInput.php b/src/Nella/Forms/DateTime/DateTimeInput.php
index 80ac4e6..ce968e7 100644
--- a/src/Nella/Forms/DateTime/DateTimeInput.php
+++ b/src/Nella/Forms/DateTime/DateTimeInput.php
@@ -322,16 +322,18 @@ private function normalizeFormat($input)
 	 */
 	public function setRequired($message = TRUE)
 	{
-		if (!is_bool($message) && !is_string($message)) {
+		if ($message !== FALSE && !is_string($message)) {
 			throw new \Nette\InvalidArgumentException('Message must be string');
 		}
 
 		parent::setRequired($message);
 
-		$this->addCondition(Form::FILLED)
-			->addRule(function (DateTimeInput $control) {
-				return $this->validateDateTime($control);
-			}, $message);
+		if ($message !== FALSE) {
+			$this->addCondition(Form::FILLED)
+				->addRule(function (DateTimeInput $control) {
+					return $this->validateDateTime($control);
+				}, $message);
+		}
 
 		return $this;
 	}
diff --git a/tests/Nella/Forms/DateTime/DateInputTest.phpt b/tests/Nella/Forms/DateTime/DateInputTest.phpt
index 91a1dc7..2347f70 100644
--- a/tests/Nella/Forms/DateTime/DateInputTest.phpt
+++ b/tests/Nella/Forms/DateTime/DateInputTest.phpt
@@ -264,7 +264,7 @@ class DateInputTest extends \Tester\TestCase
 	{
 		$control = $this->createControl();
 
-		$control->setRequired(TRUE);
+		$control->setRequired('Required');
 		Assert::true($control->isRequired());
 	}
 
diff --git a/tests/Nella/Forms/DateTime/DateTimeInputTest.phpt b/tests/Nella/Forms/DateTime/DateTimeInputTest.phpt
index 716cf98..0d74e14 100644
--- a/tests/Nella/Forms/DateTime/DateTimeInputTest.phpt
+++ b/tests/Nella/Forms/DateTime/DateTimeInputTest.phpt
@@ -510,7 +510,7 @@ class DateTimeInputTest extends \Tester\TestCase
 	{
 		$control = $this->createControl();
 
-		$control->setRequired(TRUE);
+		$control->setRequired('Required');
 		Assert::true($control->isRequired());
 	}