diff --git a/src/install.js b/src/install.js
index fb100280c7..caafcbfacc 100644
--- a/src/install.js
+++ b/src/install.js
@@ -499,7 +499,7 @@ function enableDefaultPlugins(next) {
 	}
 
 	defaultEnabled = defaultEnabled.filter(function(plugin, index, array) {
-		return array.indexOf(plugin) === -1;
+		return array.indexOf(plugin) === index;
 	});
 
 	var db = require('./database');