diff --git a/extensions/azure-functions/deployment/src/main/java/io/quarkus/azure/functions/deployment/AzureFunctionsProcessor.java b/extensions/azure-functions/deployment/src/main/java/io/quarkus/azure/functions/deployment/AzureFunctionsProcessor.java
index 0a4bb08f97ef7..bf5e89055a670 100644
--- a/extensions/azure-functions/deployment/src/main/java/io/quarkus/azure/functions/deployment/AzureFunctionsProcessor.java
+++ b/extensions/azure-functions/deployment/src/main/java/io/quarkus/azure/functions/deployment/AzureFunctionsProcessor.java
@@ -213,7 +213,7 @@ public void findFunctions(CombinedIndexBuildItem combined,
                 Class declaring = loader.loadClass(ci.name().toString());
                 Class[] params = methodInfo.parameters().stream().map(methodParameterInfo -> {
                     try {
-                        return loader.loadClass(methodParameterInfo.type().name().toString());
+                        return Class.forName(methodParameterInfo.type().name().toString(), false, loader);
                     } catch (ClassNotFoundException e) {
                         throw new DeploymentException(e);
                     }