diff --git a/Normalizer/DenormalizerInterface.php b/Normalizer/DenormalizerInterface.php
index 4edb70096..0779e8b10 100644
--- a/Normalizer/DenormalizerInterface.php
+++ b/Normalizer/DenormalizerInterface.php
@@ -22,7 +22,7 @@
 /**
  * @author Jordi Boggiano <j.boggiano@seld.be>
  *
- * @method getSupportedTypes(?string $format): array
+ * @method getSupportedTypes(?string $format): array<string|class-string, bool>
  */
 interface DenormalizerInterface
 {