diff --git a/header-only/layout-builder/awkward/LayoutBuilder.h b/header-only/layout-builder/awkward/LayoutBuilder.h
index cb0fe1830e..e66e09785d 100644
--- a/header-only/layout-builder/awkward/LayoutBuilder.h
+++ b/header-only/layout-builder/awkward/LayoutBuilder.h
@@ -415,7 +415,7 @@ namespace awkward {
       /// contents in the form of a JSON-like string.
       std::string
       form() const noexcept {
-        return "{ \"class\": \"EmptyArray\", \"parameters\": {} }";
+        return "{ \"class\": \"EmptyArray\" }";
       }
 
     private:
diff --git a/header-only/tests/test_1494-layout-builder.cpp b/header-only/tests/test_1494-layout-builder.cpp
index f86288ff91..659ccdbd9a 100644
--- a/header-only/tests/test_1494-layout-builder.cpp
+++ b/header-only/tests/test_1494-layout-builder.cpp
@@ -460,8 +460,7 @@ test_Empty() {
 
   assert(builder.form() ==
   "{ "
-      "\"class\": \"EmptyArray\", "
-      "\"parameters\": {} "
+      "\"class\": \"EmptyArray\" "
   "}");
 
   clear_buffers(buffers);
@@ -532,8 +531,7 @@ test_ListOffset_Empty() {
           "\"class\": \"ListOffsetArray\", "
           "\"offsets\": \"i64\", "
           "\"content\": { "
-              "\"class\": \"EmptyArray\", "
-              "\"parameters\": {} "
+              "\"class\": \"EmptyArray\" "
           "}, "
           "\"form_key\": \"node1\" "
       "}, "