diff --git a/src/database/mongo.js b/src/database/mongo.js
index 9976d323ab..455ef87190 100644
--- a/src/database/mongo.js
+++ b/src/database/mongo.js
@@ -108,6 +108,12 @@
 					}
 				});
 
+				db.collection('search').ensureIndex({key: 1, id: 1}, {background: true}, function(err) {
+					if(err) {
+						winston.error('Error creating index ' + err.message);
+					}
+				});
+
 				if(typeof callback === 'function') {
 					callback();
 				}
diff --git a/src/database/mongo/main.js b/src/database/mongo/main.js
index 3c24830ffa..dacce8d9f6 100644
--- a/src/database/mongo/main.js
+++ b/src/database/mongo/main.js
@@ -13,7 +13,7 @@ module.exports = function(db, module) {
 			content: content
 		};
 
-		db.collection('search').update({id:id, key:key}, {$set:data}, {upsert:true, w: 1}, function(err) {
+		db.collection('search').update({key:key, id:id}, {$set:data}, {upsert:true, w: 1}, function(err) {
 			if(err) {
 				winston.error('Error indexing ' + err.message);
 			}
@@ -41,7 +41,7 @@ module.exports = function(db, module) {
 
 	module.searchRemove = function(key, id, callback) {
 		callback = callback || helpers.noop;
-		db.collection('search').remove({id:id, key:key}, callback);
+		db.collection('search').remove({key:key, id:id}, callback);
 	};
 
 	module.flushdb = function(callback) {
diff --git a/src/favourites.js b/src/favourites.js
index cb4de2e97e..741d3a3c4f 100644
--- a/src/favourites.js
+++ b/src/favourites.js
@@ -131,7 +131,14 @@ var async = require('async'),
 				return callback(new Error('[[error:not-enough-reputation-to-downvote]]'));
 			}
 
-			toggleVote('downvote', pid, uid, callback);
+			toggleVote('downvote', pid, uid, function(err, votes) {
+				if (err) return callback(err);
+				plugins.fireHook('action:post.downvote', {
+					pid: pid,
+					uid: uid
+				});
+				callback(null, votes);
+			});
 		});
 	};