diff --git a/src/core/chunked_stream.js b/src/core/chunked_stream.js
index cf0e6b700..7c2aa5bd4 100644
--- a/src/core/chunked_stream.js
+++ b/src/core/chunked_stream.js
@@ -91,7 +91,7 @@ var ChunkedStream = (function ChunkedStreamClosure() {
       }
     },
 
-    ensureByte: function ChunkedStream_ensureRange(pos) {
+    ensureByte: function ChunkedStream_ensureByte(pos) {
       var chunk = Math.floor(pos / this.chunkSize);
       if (chunk === this.lastSuccessfulEnsureByteChunk) {
         return;