diff --git a/lib/ExpressRedisCache/route.js b/lib/ExpressRedisCache/route.js
index 4491501..3b8e36d 100644
--- a/lib/ExpressRedisCache/route.js
+++ b/lib/ExpressRedisCache/route.js
@@ -166,7 +166,11 @@ module.exports = (function () {
           /** if it's cached, display cache **/
 
           if ( cache.length ) {
-            res.contentType(cache[0].type || "text/html");
+            if (res.contentType) {
+              res.contentType(cache[0].type || "text/html");
+            } else if (res.setHeader) {
+              res.setHeader('content-type', cache[0].type || "text/html");
+            }
             if(binary){ //Convert back to binary buffer
               res.send(new Buffer(cache[0].body, 'base64'));
             }else{