diff --git a/Doc/html/Makefile b/Doc/html/Makefile
index e076043..87d231d 100644
--- a/Doc/html/Makefile
+++ b/Doc/html/Makefile
@@ -64,6 +64,8 @@
 	$(MKHTML) tut $(L2HARGS)
 
 
+include ../Makefile.deps
+
 $(PAPERDIR)/api.aux: $(APIFILES)
 	(cd $(PAPERDIR); $(MAKE) PAPER=$(PAPER) api.dvi)