diff --git a/make-includes/build_document_rules.make b/make-includes/build_document_rules.make
index 9bfb2fb..164fc65 100755
--- a/make-includes/build_document_rules.make
+++ b/make-includes/build_document_rules.make
@@ -220,7 +220,7 @@
 
 $(PRINT_QUESTIONS_TEX): $(DERIVED_XML)
 	@announce "Building $@ from $<"
-	@echo "\\markfirstpage{$(SECTION)/$(BASE_NAME)/$(@:.tex=.pdf)}" > $@
+	@echo "\\markfirstpage{$(SECTION)/$(BASE_NAME)/$(@:.tex=.pdf)}" >> $@
 	$(call xslt,$<,xml2latex.xsl,$(call xslt_parameter,department,'$(SUBJECT_CODE)'),$(call xslt_parameter,paper,'$(PAPER_NUMBER)'),$(call xslt_parameter,standalone,'no'),$(call xslt_parameter,showanswers,'no'),$(call xslt_parameter,base-path,'Sections/$(SECTION)/$(BASE_NAME)'),$(call xslt_parameter,image-format,'pdf')) >> $@
 	@echo "\\marklastpage{$(SECTION)/$(BASE_NAME)/$(@:.tex=.pdf)}" >> $@
 
@@ -274,7 +274,9 @@
 #
 $(DERIVED_XML): $(SOURCE_XML)
 	@announce "Generating $@"
-	@perl -ne 'if (/^(.*)<\@INC\[([^]]+)\]@>(.*)$$/) { print "$$1\n" . `cat $(PAPER_ROOT)/$$2` . "\n$$3\n"; } else { print; }'  $< > $@
+	@echo "<!-- THIS FILE IS AUTOMATICALLY GENERATED. DO NOT EDIT! -->" > $@
+	@echo >> $@
+	@perl -ne 'if (/^(.*)<\@INC\[([^]]+)\]@>(.*)$$/) { print "$$1\n" . `cat $(PAPER_ROOT)/$$2` . "\n$$3\n"; } else { print; }'  $< >> $@
 		
 
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