diff --git a/lib/caching.js b/lib/caching.js
index cfd203d..087f3d8 100644
--- a/lib/caching.js
+++ b/lib/caching.js
@@ -19,9 +19,11 @@ module.exports = function Caching(store) {
 				queues[key].push(done);
 			} else {
 				queues[key] = [done];
-				work(function(){
+				work(function(err){
 					var args = Array.prototype.slice.call(arguments, 0);
-					store.set(key, ttl, args);		
+					if (!err) {
+						store.set(key, ttl, args);
+					}
 					queues[key].forEach(function(done){
 						done.apply(null, args);
 					});
@@ -34,4 +36,4 @@ module.exports = function Caching(store) {
 	cacher.store = store;
 
 	return cacher;
-};
\ No newline at end of file
+};