diff --git a/.check-build b/.check-build
index bd18011..73fe4a5 100755
--- a/.check-build
+++ b/.check-build
@@ -55,7 +55,7 @@ main() {
 
     case $labnum in
         "lab1") check_lab1;;
-        "lab2a"|"lab2b"|"lab2c") check_lab2;;
+        "lab2a"|"lab2b"|"lab2c"|"lab2d") check_lab2;;
         "lab3a"|"lab3b") check_lab3;;
         "lab4a") check_lab4a;;
         "lab4b") check_lab4b;;
diff --git a/Makefile b/Makefile
index b02554f..011bb21 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,9 @@
-# This is the Makefile helping you submit the labs.  
-# Just create 6.824/api.key with your API key in it, 
-# and submit your lab with the following command: 
-#     $ make [lab1|lab2a|lab2b|lab2c|lab3a|lab3b|lab4a|lab4b]
+# This is the Makefile helping you submit the labs.
+# Just create 6.824/api.key with your API key in it,
+# and submit your lab with the following command:
+#     $ make [lab1|lab2a|lab2b|lab2c|lab2d|lab3a|lab3b|lab4a|lab4b]
 
-LABS=" lab1 lab2a lab2b lab2c lab3a lab3b lab4a lab4b "
+LABS=" lab1 lab2a lab2b lab2c lab2d lab3a lab3b lab4a lab4b "
 
 %: check-%
 	@echo "Preparing $@-handin.tar.gz"