diff --git a/src/core/evaluator.js b/src/core/evaluator.js
index e353280cd..52cbd6c9c 100644
--- a/src/core/evaluator.js
+++ b/src/core/evaluator.js
@@ -1120,7 +1120,7 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
               var name = args[0].name;
               if (xobjsCache.key === name) {
                 if (xobjsCache.texts) {
-                  Util.concatenateToArray(bidiTexts, xobjsCache.texts.items);
+                  Util.appendToArray(bidiTexts, xobjsCache.texts.items);
                   Util.extendObj(textContent.styles, xobjsCache.texts.styles);
                 }
                 break;
@@ -1151,7 +1151,7 @@ var PartialEvaluator = (function PartialEvaluatorClosure() {
               return self.getTextContent(xobj,
                 xobj.dict.get('Resources') || resources, stateManager).
                 then(function (formTextContent) {
-                  Util.concatenateToArray(bidiTexts, formTextContent.items);
+                  Util.appendToArray(bidiTexts, formTextContent.items);
                   Util.extendObj(textContent.styles, formTextContent.styles);
                   stateManager.restore();
 
diff --git a/src/core/stream.js b/src/core/stream.js
index df59890c8..406d4d908 100644
--- a/src/core/stream.js
+++ b/src/core/stream.js
@@ -274,7 +274,7 @@ var StreamsSequenceStream = (function StreamsSequenceStreamClosure() {
     for (var i = 0, ii = this.streams.length; i < ii; i++) {
       var stream = this.streams[i];
       if (stream.getBaseStreams) {
-        Util.concatenateToArray(baseStreams, stream.getBaseStreams());
+        Util.appendToArray(baseStreams, stream.getBaseStreams());
       }
     }
     return baseStreams;
diff --git a/src/shared/util.js b/src/shared/util.js
index ae4d85d40..77e96362f 100644
--- a/src/shared/util.js
+++ b/src/shared/util.js
@@ -678,12 +678,11 @@ var Util = PDFJS.Util = (function UtilClosure() {
     return num < 0 ? -1 : 1;
   };
 
-  // TODO(mack): Rename appendToArray
-  Util.concatenateToArray = function concatenateToArray(arr1, arr2) {
+  Util.appendToArray = function Util_appendToArray(arr1, arr2) {
     Array.prototype.push.apply(arr1, arr2);
   };
 
-  Util.prependToArray = function concatenateToArray(arr1, arr2) {
+  Util.prependToArray = function Util_prependToArray(arr1, arr2) {
     Array.prototype.unshift.apply(arr1, arr2);
   };