--- a/Makefile.in
+++ b/Makefile.in
@@ -25,7 +25,7 @@ CFLAGS = @CFLAGS@ $(DEFS)
 TARBALL = xtail.tar
 XTAIL_OBJECTS = xtail.o entryfuncs.o miscfuncs.o
 DISTFILES = Makefile.in README acconfig.h config.h.in configure \
-	configure.in entryfuncs.c install-sh miscfuncs.c xtail.1 xtail.c \
+	configure.ac entryfuncs.c install-sh miscfuncs.c xtail.1 xtail.c \
 	xtail.h
 
 ###
@@ -70,9 +70,9 @@ Makefile : $(srcdir)/Makefile.in  config.status
 #config.h : $(srcdir)/config.h.in  config.status
 #	CONFIG_FILES= CONFIG_HEADERS=$@ $(SHELL) ./config.status
 
-$(srcdir)/configure : $(srcdir)/configure.in
+$(srcdir)/configure : $(srcdir)/configure.ac
 	cd $(srcdir) && autoconf
 
-$(srcdir)/config.h.in : $(srcdir)/configure.in $(srcdir)/acconfig.h
+$(srcdir)/config.h.in : $(srcdir)/configure.ac $(srcdir)/acconfig.h
 	cd $(srcdir) && autoheader