diff --git a/src/core/pdf_manager.js b/src/core/pdf_manager.js
index b6343b1cf..7c65a0631 100644
--- a/src/core/pdf_manager.js
+++ b/src/core/pdf_manager.js
@@ -33,24 +33,24 @@ var BasePdfManager = (function BasePdfManagerClosure() {
       throw new NotImplementedException();
     },
 
-    ensureModel: function BasePdfManager_ensureModel(prop, args) {
-      return this.ensure(this.pdfModel, prop, args);
+    ensureDoc: function BasePdfManager_ensureDoc(prop, args) {
+      return this.ensure(this.pdfDocument, prop, args);
     },
 
     ensureXRef: function BasePdfManager_ensureXRef(prop, args) {
-      return this.ensure(this.pdfModel.xref, prop, args);
+      return this.ensure(this.pdfDocument.xref, prop, args);
     },
 
     ensureCatalog: function BasePdfManager_ensureCatalog(prop, args) {
-      return this.ensure(this.pdfModel.catalog, prop, args);
+      return this.ensure(this.pdfDocument.catalog, prop, args);
     },
 
     getPage: function BasePdfManager_pagePage(pageIndex) {
-      return this.pdfModel.getPage(pageIndex);
+      return this.pdfDocument.getPage(pageIndex);
     },
 
     cleanup: function BasePdfManager_cleanup() {
-      return this.pdfModel.cleanup();
+      return this.pdfDocument.cleanup();
     },
 
     ensure: function BasePdfManager_ensure(obj, prop, args) {
@@ -66,7 +66,7 @@ var BasePdfManager = (function BasePdfManagerClosure() {
     },
 
     updatePassword: function BasePdfManager_updatePassword(password) {
-      this.pdfModel.xref.password = this.password = password;
+      this.pdfDocument.xref.password = this.password = password;
       if (this.passwordChangedPromise) {
         this.passwordChangedPromise.resolve();
       }
@@ -83,7 +83,7 @@ var BasePdfManager = (function BasePdfManagerClosure() {
 var LocalPdfManager = (function LocalPdfManagerClosure() {
   function LocalPdfManager(data, password) {
     var stream = new Stream(data);
-    this.pdfModel = new PDFDocument(this, stream, password);
+    this.pdfDocument = new PDFDocument(this, stream, password);
     this.loadedStream = new LegacyPromise();
     this.loadedStream.resolve(stream);
   }
@@ -150,7 +150,7 @@ var NetworkPdfManager = (function NetworkPdfManagerClosure() {
     this.streamManager = new ChunkedStreamManager(args.length, RANGE_CHUNK_SIZE,
                                                   args.url, params);
 
-    this.pdfModel = new PDFDocument(this, this.streamManager.getStream(),
+    this.pdfDocument = new PDFDocument(this, this.streamManager.getStream(),
                                     args.password);
   }
 
diff --git a/src/core/worker.js b/src/core/worker.js
index 1539f24bc..064858983 100644
--- a/src/core/worker.js
+++ b/src/core/worker.js
@@ -30,10 +30,10 @@ var WorkerMessageHandler = PDFJS.WorkerMessageHandler = {
       var loadDocumentPromise = new LegacyPromise();
 
       var parseSuccess = function parseSuccess() {
-        var numPagesPromise = pdfManager.ensureModel('numPages');
-        var fingerprintPromise = pdfManager.ensureModel('fingerprint');
+        var numPagesPromise = pdfManager.ensureDoc('numPages');
+        var fingerprintPromise = pdfManager.ensureDoc('fingerprint');
         var outlinePromise = pdfManager.ensureCatalog('documentOutline');
-        var infoPromise = pdfManager.ensureModel('documentInfo');
+        var infoPromise = pdfManager.ensureDoc('documentInfo');
         var metadataPromise = pdfManager.ensureCatalog('metadata');
         var encryptedPromise = pdfManager.ensureXRef('encrypt');
         var javaScriptPromise = pdfManager.ensureCatalog('javaScript');
@@ -60,9 +60,9 @@ var WorkerMessageHandler = PDFJS.WorkerMessageHandler = {
         loadDocumentPromise.reject(e);
       };
 
-      pdfManager.ensureModel('checkHeader', []).then(function() {
-        pdfManager.ensureModel('parseStartXRef', []).then(function() {
-          pdfManager.ensureModel('parse', [recoveryMode]).then(
+      pdfManager.ensureDoc('checkHeader', []).then(function() {
+        pdfManager.ensureDoc('parseStartXRef', []).then(function() {
+          pdfManager.ensureDoc('parse', [recoveryMode]).then(
               parseSuccess, parseFailure);
         }, parseFailure);
       }, parseFailure);