diff --git a/src/Utils/Reflection.php b/src/Utils/Reflection.php
index 181596846..d7c1317f2 100644
--- a/src/Utils/Reflection.php
+++ b/src/Utils/Reflection.php
@@ -188,6 +188,9 @@ public static function expandClassName(string $name, \ReflectionClass $rc): stri
 	 */
 	public static function getUseStatements(\ReflectionClass $class): array
 	{
+		if ($class->isAnonymous()) {
+			throw new Nette\NotImplementedException('Anonymous classes are not supported.');
+		}
 		static $cache = [];
 		if (!isset($cache[$name = $class->getName()])) {
 			if ($class->isInternal()) {
diff --git a/tests/Utils/Reflection.expandClassName.phpt b/tests/Utils/Reflection.expandClassName.phpt
index 38680f100..9d33ccc99 100644
--- a/tests/Utils/Reflection.expandClassName.phpt
+++ b/tests/Utils/Reflection.expandClassName.phpt
@@ -27,6 +27,12 @@ Assert::exception(function () use ($rcTest) {
 }, Nette\InvalidArgumentException::class, 'Class name must not be empty.');
 
 
+Assert::exception(function () use ($rcTest) {
+	Reflection::expandClassName('A', new ReflectionClass(new class {
+	}));
+}, Nette\NotImplementedException::class, 'Anonymous classes are not supported.');
+
+
 Assert::same('A', Reflection::expandClassName('A', $rcTest));
 Assert::same('A\B', Reflection::expandClassName('C', $rcTest));
 
@@ -139,3 +145,8 @@ Assert::same(
 	[],
 	Reflection::getUseStatements(new ReflectionClass('stdClass'))
 );
+
+Assert::exception(function () use ($rcTest) {
+	Reflection::getUseStatements(new ReflectionClass(new class {
+	}));
+}, Nette\NotImplementedException::class, 'Anonymous classes are not supported.');