diff --git a/modules/swagger-core/src/main/java/io/swagger/v3/core/jackson/ModelResolver.java b/modules/swagger-core/src/main/java/io/swagger/v3/core/jackson/ModelResolver.java
index f25f99a654..eb2097f627 100644
--- a/modules/swagger-core/src/main/java/io/swagger/v3/core/jackson/ModelResolver.java
+++ b/modules/swagger-core/src/main/java/io/swagger/v3/core/jackson/ModelResolver.java
@@ -3269,6 +3269,7 @@ protected void resolveSchemaMembers(Schema schema, Annotated a, Annotation[] ann
         }
         List<String> allowableValues = resolveAllowableValues(a, annotations, schemaAnnotation);
         if (allowableValues != null) {
+            schema.setEnum(new ArrayList());
             for (String prop : allowableValues) {
                 schema.addEnumItemObject(prop);
             }