diff --git a/makefile-templates/Makefile.misc b/makefile-templates/Makefile.misc
index fb0ebbe..4791b05 100755
--- a/makefile-templates/Makefile.misc
+++ b/makefile-templates/Makefile.misc
@@ -66,8 +66,10 @@
 
 ################################################################################
 #
-# Specify the current paper number. THIS MUST BE DEFINED!
+# Specify the current subject code and paper number.
+# THESE MUST BE DEFINED!
 #
+SUBJECT_CODE?=$(error The required variable SUBJECT_CODE has not been defined. Please set it to the correct value for this paper)
 PAPER_NUMBER?=$(error The required variable PAPER_NUMBER has not been defined. Please set it to the correct value for this paper)