diff --git a/services/clsi/app/coffee/CompileController.coffee b/services/clsi/app/coffee/CompileController.coffee
index 60c5c64c0b..99973fdd10 100644
--- a/services/clsi/app/coffee/CompileController.coffee
+++ b/services/clsi/app/coffee/CompileController.coffee
@@ -17,7 +17,7 @@ module.exports = CompileController =
 				return next(error) if error?
 				CompileManager.doCompileWithLock request, (error, outputFiles = []) ->
 					if error instanceof Errors.AlreadyCompilingError
-						code = 423 # Http 443 Locked
+						code = 423 # Http 423 Locked
 						status = "compile-in-progress"
 					else if error instanceof Errors.FilesOutOfSyncError
 						code = 409 # Http 409 Conflict