diff --git a/build/tasks/create-installer.coffee b/build/tasks/create-installer.coffee
index bb81cbb3f..bfb57dde1 100644
--- a/build/tasks/create-installer.coffee
+++ b/build/tasks/create-installer.coffee
@@ -6,7 +6,7 @@ module.exports = (grunt) ->
   {spawn, rm} = require('./task-helpers')(grunt)
 
   grunt.registerTask 'create-installer', 'Create the Windows installer', ->
-    return unless if process.platform is 'win32'
+    return unless process.platform is 'win32'
 
     done = @async()