diff --git a/doc/lispref/Makefile.in b/doc/lispref/Makefile.in
index 9b7b6d8ea9d..0a228271be3 100644
--- a/doc/lispref/Makefile.in
+++ b/doc/lispref/Makefile.in
@@ -144,7 +144,7 @@ ps: $(PS_TARGETS)
 ${buildinfodir}:
 	${MKDIR_P} $@
 
-auxfiles: $(buildinfodir)/elisp_type_hierarchy.txt $(buildinfodir)/elisp_type_hierarchy.jpg
+auxfiles = $(buildinfodir)/elisp_type_hierarchy.txt $(buildinfodir)/elisp_type_hierarchy.jpg
 
 $(buildinfodir)/elisp_type_hierarchy.txt: $(srcdir)/elisp_type_hierarchy.txt | ${buildinfodir}
 	cp $< $@
@@ -152,7 +152,7 @@ $(buildinfodir)/elisp_type_hierarchy.txt: $(srcdir)/elisp_type_hierarchy.txt | $
 $(buildinfodir)/elisp_type_hierarchy.jpg: $(srcdir)/elisp_type_hierarchy.jpg | ${buildinfodir}
 	cp $< $@
 
-$(buildinfodir)/elisp.info: $(srcs) auxfiles | ${buildinfodir}
+$(buildinfodir)/elisp.info: $(srcs) $(auxfiles) | ${buildinfodir}
 	$(AM_V_GEN)$(MAKEINFO) $(MAKEINFO_OPTS) $(INFO_OPTS) -o $@ $<
 
 elisp.dvi: $(srcs)
@@ -187,6 +187,7 @@ infoclean:
 	  $(buildinfodir)/elisp.info \
 	  $(buildinfodir)/elisp.info-[1-9] \
 	  $(buildinfodir)/elisp.info-[1-9][0-9]
+	rm -f $(auxfiles)
 
 bootstrap-clean maintainer-clean: distclean infoclean
 	rm -f TAGS