diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
index ddae177f7b85..e905c07b8d58 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/DefaultCodegen.java
@@ -603,6 +603,7 @@ public Map<String, ModelsMap> postProcessAllModels(Map<String, ModelsMap> objs)
                 objsValue.put("classname", cm.classname);
                 objsValue.putAll(additionalProperties);
                 objs.put(cm.name, objsValue);
+                objsValue.put("javaxPackage", additionalProperties.getOrDefault("javaxPackage", "javax"));
             }
 
             // Gather data from all the models that contain oneOf into OneOfImplementorAdditionalData classes