diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenParameter.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenParameter.java
index 73b30bedacc..4194f7d92ea 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenParameter.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/CodegenParameter.java
@@ -113,7 +113,7 @@ public class CodegenParameter implements IJsonSchemaValidationProperties {
      */
     public Number multipleOf;
 
-    public String constant; // for const
+    public String constant; // for const or enum with a single item
 
     private Integer maxProperties;
     private Integer minProperties;