diff --git a/src/core/annotation.js b/src/core/annotation.js
index c30fdaeba..4b8b95d18 100644
--- a/src/core/annotation.js
+++ b/src/core/annotation.js
@@ -48,7 +48,7 @@ import {
   Name,
   RefSet,
 } from "./primitives.js";
-import { Catalog } from "./obj.js";
+import { Catalog } from "./catalog.js";
 import { ColorSpace } from "./colorspace.js";
 import { FileSpec } from "./file_spec.js";
 import { ObjectLoader } from "./object_loader.js";
diff --git a/src/core/obj.js b/src/core/catalog.js
similarity index 100%
rename from src/core/obj.js
rename to src/core/catalog.js
diff --git a/src/core/document.js b/src/core/document.js
index 27b9dd6ac..923bf29d5 100644
--- a/src/core/document.js
+++ b/src/core/document.js
@@ -54,7 +54,7 @@ import {
 import { NullStream, Stream, StreamsSequenceStream } from "./stream.js";
 import { AnnotationFactory } from "./annotation.js";
 import { calculateMD5 } from "./crypto.js";
-import { Catalog } from "./obj.js";
+import { Catalog } from "./catalog.js";
 import { Linearization } from "./parser.js";
 import { ObjectLoader } from "./object_loader.js";
 import { OperatorList } from "./operator_list.js";