diff --git a/zio-http/shared/src/main/scala/zio/http/endpoint/openapi/JsonSchema.scala b/zio-http/shared/src/main/scala/zio/http/endpoint/openapi/JsonSchema.scala
index 0d8c5dacbe..aa75b8682c 100644
--- a/zio-http/shared/src/main/scala/zio/http/endpoint/openapi/JsonSchema.scala
+++ b/zio-http/shared/src/main/scala/zio/http/endpoint/openapi/JsonSchema.scala
@@ -1215,6 +1215,8 @@ object JsonSchema {
     def addAll(value: Chunk[(java.lang.String, JsonSchema)]): Object =
       value.foldLeft(this) { case (obj, (name, schema)) =>
         schema match {
+          case Object(properties, additionalProperties, _) if properties.isEmpty && additionalProperties.isRight =>
+            obj.copy(properties = obj.properties + (name -> schema))
           case Object(properties, additionalProperties, required) =>
             obj.copy(
               properties = obj.properties ++ properties,