don't attempt to require a directory

src/socket.io/index.js

@@ -41,8 +41,11 @@ Sockets.init = function(server) {
 		files.splice(files.indexOf('index.js'), 1);
 
 		async.each(files, function(lib, next) {
-			lib = lib.slice(0, -3);
-			Namespaces[lib] = require('./' + lib);
+			if (lib.slice(0, -3) === '.js') {
+				lib = lib.slice(0, -3);
+				Namespaces[lib] = require('./' + lib);
+			}
+
 			next();
 		});
 	});