 			options    = if isFunction then opt(file) else opt
 			data       = ngClassify str, options
 		catch err
-			return @emit 'error', new Error err
+			return @emit 'error', new gutil.PluginError 'gulp-ng-classify', err
 
 		file.contents = new Buffer data
 
 		@emit 'data', file
 
-	es.through modifyFile+	es.through modifyFile

			@emit 'data', file

		return if file.isStream()
			@emit 'error', new Error 'gulp-ngClassify: Streaming not supported'

		str = file.contents.toString 'utf8'
		data = ''

es         = require 'event-stream'
ngClassify = require 'ng-classify'
gutil      = require 'gulp-util'

module.exports = (opt) ->
	modifyFile = (file) ->
