diff --git a/tools/mtouch/Application.cs b/tools/mtouch/Application.cs
index 95ff4b234a..815f079040 100644
--- a/tools/mtouch/Application.cs
+++ b/tools/mtouch/Application.cs
@@ -1450,7 +1450,7 @@ namespace Xamarin.Bundler {
 			if (!EnableMSym)
 				return;
 
-			var target_directory = string.Format ("{0}.msym", AppDirectory);
+			var target_directory = string.Format ("{0}.mSYM", AppDirectory);
 			if (!Directory.Exists (target_directory))
 				Directory.CreateDirectory (target_directory);