diff --git a/Doc/Makefile b/Doc/Makefile
index 1b8b6b7..ac1e6bc 100644
--- a/Doc/Makefile
+++ b/Doc/Makefile
@@ -276,7 +276,7 @@
 COMMONPERL=perl/manual.perl perl/python.perl
 
 l2h:
-	(cd html; $(MAKE))
+	(cd html; $(MAKE) TEXINPUTS=../paper-$(PAPER):../texinputs)
 
 l2hapi: $(COMMONPERL)
 	$(MKHTML) api $(L2HARGS)