diff --git a/quarkus/extensions/kogito-quarkus-serverless-workflow-extension/kogito-quarkus-serverless-workflow-deployment/src/main/java/org/kie/kogito/quarkus/serverless/workflow/ClassAnnotatedWorkflowHandlerGenerator.java b/quarkus/extensions/kogito-quarkus-serverless-workflow-extension/kogito-quarkus-serverless-workflow-deployment/src/main/java/org/kie/kogito/quarkus/serverless/workflow/ClassAnnotatedWorkflowHandlerGenerator.java
index 3a717c12ace..dbb78b47413 100644
--- a/quarkus/extensions/kogito-quarkus-serverless-workflow-extension/kogito-quarkus-serverless-workflow-deployment/src/main/java/org/kie/kogito/quarkus/serverless/workflow/ClassAnnotatedWorkflowHandlerGenerator.java
+++ b/quarkus/extensions/kogito-quarkus-serverless-workflow-extension/kogito-quarkus-serverless-workflow-deployment/src/main/java/org/kie/kogito/quarkus/serverless/workflow/ClassAnnotatedWorkflowHandlerGenerator.java
@@ -26,6 +26,8 @@
 import org.jboss.jandex.Type;
 import org.kie.kogito.codegen.api.context.KogitoBuildContext;
 
+import com.github.javaparser.ast.NodeList;
+
 import static com.github.javaparser.StaticJavaParser.parseClassOrInterfaceType;
 import static com.github.javaparser.StaticJavaParser.parseType;
 
@@ -46,6 +48,9 @@ protected final com.github.javaparser.ast.type.Type fromClass(Type param) {
                 return parseClassOrInterfaceType(param.asClassType().name().toString());
             case PRIMITIVE:
                 return parseType(param.asPrimitiveType().name().toString());
+            case PARAMETERIZED_TYPE:
+                return parseClassOrInterfaceType(param.asParameterizedType().name().toString())
+                        .setTypeArguments(NodeList.nodeList(param.asParameterizedType().arguments().stream().map(this::fromClass).collect(Collectors.toList())));
             default:
                 throw new UnsupportedOperationException("Kind " + param.kind() + " is not supported");
         }
diff --git a/quarkus/extensions/kogito-quarkus-serverless-workflow-extension/kogito-quarkus-serverless-workflow-integration-test/src/main/resources/specs/multiplication.yaml b/quarkus/extensions/kogito-quarkus-serverless-workflow-extension/kogito-quarkus-serverless-workflow-integration-test/src/main/resources/specs/multiplication.yaml
index 295d1dc332e..fb63a5e67c3 100644
--- a/quarkus/extensions/kogito-quarkus-serverless-workflow-extension/kogito-quarkus-serverless-workflow-integration-test/src/main/resources/specs/multiplication.yaml
+++ b/quarkus/extensions/kogito-quarkus-serverless-workflow-extension/kogito-quarkus-serverless-workflow-integration-test/src/main/resources/specs/multiplication.yaml
@@ -13,6 +13,13 @@ paths:
           schema:
             type: string
           required: true
+        - in: query
+          name: unusedList
+          required: false
+          schema: 
+            type: array
+            items: 
+              type: string
       requestBody:
         content:
           application/json:
@@ -33,10 +40,15 @@ components:
   schemas:
     MultiplicationOperation:
       type: object
+      required: [leftElement,rightElement]
       properties:
         leftElement:
           format: float
           type: number
         rightElement:
           format: float
-          type: number
\ No newline at end of file
+          type: number
+        unusedElement:
+          type: array
+          items:
+            type: string
\ No newline at end of file