diff --git a/src/bufferedbinaryajax.js b/src/bufferedbinaryajax.js
index f7b2086..cd5709a 100644
--- a/src/bufferedbinaryajax.js
+++ b/src/bufferedbinaryajax.js
@@ -71,7 +71,7 @@ var BufferedBinaryAjax = function(strUrl, fncCallback, fncError) {
 				oHTTP.setRequestHeader("Range", "bytes=" + aRange[0] + "-" + aRange[1]);
 			}
 
-			oHTTP.setRequestHeader("If-Modified-Since", "Sat, 1 Jan 1970 00:00:00 GMT");
+			oHTTP.setRequestHeader("If-Modified-Since", "Sat, 01 Jan 1970 00:00:00 GMT");
 
 			oHTTP.send(null);
 		} else {