diff --git a/src/core/document.js b/src/core/document.js
index 3076490dc..4513ae71d 100644
--- a/src/core/document.js
+++ b/src/core/document.js
@@ -600,19 +600,6 @@ class PDFDocument {
       info("Cannot fetch AcroForm entry; assuming no AcroForms are present");
       this.acroForm = null;
     }
-
-    // Check if a Collection dictionary is present in the document.
-    try {
-      const collection = this.catalog.catDict.get("Collection");
-      if (isDict(collection) && collection.size > 0) {
-        this.collection = collection;
-      }
-    } catch (ex) {
-      if (ex instanceof MissingDataException) {
-        throw ex;
-      }
-      info("Cannot fetch Collection dictionary.");
-    }
   }
 
   get linearization() {
@@ -745,7 +732,7 @@ class PDFDocument {
       IsLinearized: !!this.linearization,
       IsAcroFormPresent: !!this.acroForm,
       IsXFAPresent: !!this.xfa,
-      IsCollectionPresent: !!this.collection,
+      IsCollectionPresent: !!this.catalog.collection,
     };
 
     let infoDict;
diff --git a/src/core/obj.js b/src/core/obj.js
index 47dcd902b..eaf885a7f 100644
--- a/src/core/obj.js
+++ b/src/core/obj.js
@@ -84,6 +84,22 @@ class Catalog {
     return shadow(this, "version", version.name);
   }
 
+  get collection() {
+    let collection = null;
+    try {
+      const obj = this.catDict.get("Collection");
+      if (isDict(obj) && obj.size > 0) {
+        collection = obj;
+      }
+    } catch (ex) {
+      if (ex instanceof MissingDataException) {
+        throw ex;
+      }
+      info("Cannot fetch Collection entry; assuming no collection is present.");
+    }
+    return shadow(this, "collection", collection);
+  }
+
   get metadata() {
     const streamRef = this.catDict.getRaw("Metadata");
     if (!isRef(streamRef)) {