diff --git a/http/src/main/java/retrofit/http/Fetcher.java b/http/src/main/java/retrofit/http/Fetcher.java
index 2a460ba91ceb0c480d3907712cc060cd77353947..8f4d1f66e8b9ce2024244e2d49653f91ca062758 100644
--- a/http/src/main/java/retrofit/http/Fetcher.java
+++ b/http/src/main/java/retrofit/http/Fetcher.java
@@ -98,7 +98,7 @@ public class Fetcher {
           try {
             byte[] buffer = new byte[4096];
             int read;
-            while ((read = in.read(buffer)) > -1) {
+            while ((read = in.read(buffer)) != -1) {
               out.write(buffer, read);
               if (progressListener != null) {
                 totalRead += read;