diff --git a/modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java b/modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java
index 01f903967db..32f3f9c1470 100644
--- a/modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java
+++ b/modules/swagger-codegen/src/main/java/io/swagger/codegen/DefaultCodegen.java
@@ -2762,6 +2762,7 @@ public CodegenParameter fromParameter(Parameter param, Set<String> imports) {
                 p.isPrimitiveType = cp.isPrimitiveType;
                 p.isContainer = true;
                 p.isListContainer = true;
+                p.uniqueItems = impl.getUniqueItems() == null ? false : impl.getUniqueItems();
 
                 // set boolean flag (e.g. isString)
                 setParameterBooleanFlagWithCodegenProperty(p, cp);