diff --git a/make-includes/standard_rules.make b/make-includes/standard_rules.make
index 573c85d..87e8627 100644
--- a/make-includes/standard_rules.make
+++ b/make-includes/standard_rules.make
@@ -80,9 +80,9 @@
 #
 %.tex: %-derived.xml
 ifdef UNICODE
-	$(call xslt,$<,xml2xelatex.xsl,$(call xslt_parameter,subject-code,'$(SUBJECT_CODE)'),$(call xslt_parameter,paper-number,'$(PAPER_NUMBER)'),$(call xslt_parameter,paper-year,'$(PAPER_YEAR)'),$(call xslt_parameter,period-code,'$(PAPER_PERIOD)')) > $@
+	$(call xslt,$<,xml2xelatex.xsl,$(call xslt_parameter,subject-code,'$(SUBJECT_CODE)'),$(call xslt_parameter,paper-number,'$(PAPER_NUMBER)'),$(call xslt_parameter,paper-year,'$(PAPER_YEAR)'),$(call xslt_parameter,period-code,'$(PAPER_PERIOD)'),$(call xslt_parameter,paper-include-path,'$(ALL_PAPERS_ROOT)/$(PAPER_YEAR)/$(SUBJECT_CODE)$(PAPER_NUMBER)')) > $@
 else
-	$(call xslt,$<,xml2latex.xsl,$(call xslt_parameter,subject-code,'$(SUBJECT_CODE)'),$(call xslt_parameter,paper-number,'$(PAPER_NUMBER)'),$(call xslt_parameter,paper-year,'$(PAPER_YEAR)'),$(call xslt_parameter,period-code,'$(PAPER_PERIOD)')) > $@
+	$(call xslt,$<,xml2latex.xsl,$(call xslt_parameter,subject-code,'$(SUBJECT_CODE)'),$(call xslt_parameter,paper-number,'$(PAPER_NUMBER)'),$(call xslt_parameter,paper-year,'$(PAPER_YEAR)'),$(call xslt_parameter,period-code,'$(PAPER_PERIOD)'),$(call xslt_parameter,paper-include-path,'$(ALL_PAPERS_ROOT)/$(PAPER_YEAR)/$(SUBJECT_CODE)$(PAPER_NUMBER)')) > $@
 endif
 #
 # HTML from derived XML.