diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/transport/AmazonS3.java b/org.eclipse.jgit/src/org/eclipse/jgit/transport/AmazonS3.java
index 705a84613..f43ea637a 100644
--- a/org.eclipse.jgit/src/org/eclipse/jgit/transport/AmazonS3.java
+++ b/org.eclipse.jgit/src/org/eclipse/jgit/transport/AmazonS3.java
@@ -489,16 +489,14 @@ private void putImpl(final String bucket, final String key,
 
 		final String md5str = Base64.encodeBytes(csum);
 		final long len = buf.length();
-		final String lenstr = String.valueOf(len);
 		for (int curAttempt = 0; curAttempt < maxAttempts; curAttempt++) {
 			final HttpURLConnection c = open("PUT", bucket, key); //$NON-NLS-1$
-			c.setRequestProperty("Content-Length", lenstr); //$NON-NLS-1$
+			c.setFixedLengthStreamingMode(len);
 			c.setRequestProperty("Content-MD5", md5str); //$NON-NLS-1$
 			c.setRequestProperty(X_AMZ_ACL, acl);
 			encryption.request(c, X_AMZ_META);
 			authorize(c);
 			c.setDoOutput(true);
-			c.setFixedLengthStreamingMode((int) len);
 			monitor.beginTask(monitorTask, (int) (len / 1024));
 			final OutputStream os = c.getOutputStream();
 			try {