diff --git a/Source/Build/Build.cs b/Source/Build/Build.cs
index 6db4da0b..f973380b 100644
--- a/Source/Build/Build.cs
+++ b/Source/Build/Build.cs
@@ -32,7 +32,7 @@ namespace OpenTK.Build
 
         static string PrebuildXml = Path.Combine(ToolPath, "Prebuild.xml");
 
-        static Regex DataFiles = new Regex(@"^.*\.(bmp|png|jpg|txt|glsl|wav|ogg)$",
+        static Regex DataFiles = new Regex(@"^.*\.(bmp|png|jpg|txt|glsl|wav|ogg)$",
                                            RegexOptions.Compiled | RegexOptions.IgnoreCase);
 
         enum BuildMode