diff --git a/extensions/jaxb/runtime/src/main/java/io/quarkus/jaxb/runtime/JaxbContextProducer.java b/extensions/jaxb/runtime/src/main/java/io/quarkus/jaxb/runtime/JaxbContextProducer.java
index 19e75772d2703..3da8e6612202e 100644
--- a/extensions/jaxb/runtime/src/main/java/io/quarkus/jaxb/runtime/JaxbContextProducer.java
+++ b/extensions/jaxb/runtime/src/main/java/io/quarkus/jaxb/runtime/JaxbContextProducer.java
@@ -38,7 +38,7 @@ public JAXBContext jaxbContext(Instance<JaxbContextCustomizer> customizers) {
                     classes.add(clazz);
                 }
             }
-            return JAXBContext.newInstance(classes.toArray(new Class[classes.size()]), properties);
+            return JAXBContext.newInstance(classes.toArray(new Class[0]), properties);
         } catch (JAXBException | ClassNotFoundException e) {
             throw new RuntimeException(e);
         }