diff --git a/submit.m b/submit.m
index 48f3e71..9f12ad6 100644
--- a/submit.m
+++ b/submit.m
@@ -1,10 +1,10 @@
-function submit(part)
+function submit(partId)
 %SUBMIT Submit your code and output to the ml-class servers
 %   SUBMIT() will connect to the ml-class server and submit your solution

   fprintf('==\n== [ml-class] Submitting Solutions | Programming Exercise %s\n==\n', ...
           homework_id());
-  if ~exist('part', 'var') || isempty(part)
+  if ~exist('partId', 'var') || isempty(partId)
     partId = promptPart();
   end