diff --git a/contrib/ChangeLog b/contrib/ChangeLog
index 4bd266fa18b6481564b39463380761ef5992a60c..9f46506c0934b315312860048f2ee23f6e13a931 100644
--- a/contrib/ChangeLog
+++ b/contrib/ChangeLog
@@ -1,3 +1,8 @@
+2004-04-09  Nathanael Nerode  <neroden@gcc.gnu.org>
+
+	* gcc_update (files_and_dependencies): libobjc/configure now
+	depends on configure.ac, not configure.in.
+
 2004-04-01  Kelley Cook  <kcook@gcc.gnu.org>
 
 	* gcc_update (files_and_dependencies): Remove gcc/ada/*.texi.
diff --git a/contrib/gcc_update b/contrib/gcc_update
index c5a3c0c6cb5ec127ac93e563dcd2bc057fdb3ee2..9464c02ff66f3c5abcd2b69003459e1127edd5aa 100755
--- a/contrib/gcc_update
+++ b/contrib/gcc_update
@@ -80,7 +80,7 @@ libf2c/libI77/stamp-h.in: libf2c/libI77/configure.in
 libf2c/libI77/config.h.in: libf2c/libI77/configure.in libf2c/libI77/stamp-h.in
 libf2c/libU77/configure: libf2c/libU77/configure.in
 libf2c/libU77/stamp-h.in: libf2c/libU77/configure.in libf2c/libU77/acconfig.h
-libobjc/configure: libobjc/configure.in
+libobjc/configure: libobjc/configure.ac
 # fastjar
 fastjar/aclocal.m4: fastjar/configure.ac
 fastjar/Makefile.in: fastjar/Makefile.am fastjar/configure.ac fastjar/aclocal.m4
diff --git a/libobjc/ChangeLog b/libobjc/ChangeLog
index 03b4c2191f97baf5c44a386a541c65ab1128e251..c4c8832e6c37625f5be40181d0201ae35e7d7182 100644
--- a/libobjc/ChangeLog
+++ b/libobjc/ChangeLog
@@ -1,5 +1,8 @@
 2004-04-09  Nathanael Nerode  <neroden@gcc.gnu.org>
 
+	* configure.in: Rename to configure.ac.
+	* Makefile.in: Update to match.
+
 	* Makefile.in: Remove toolexecdir, glibcpp_toolexecdir (unused).
 	Replace glibcpp_toolexeclibdir with toolexeclibdir.
 	* configure.in: Remove glibcpp_toolexecdir (unused).
diff --git a/libobjc/Makefile.in b/libobjc/Makefile.in
index ffa4ad64f27175d808e3da897a9a44f295d3bf12..16e882ccb28dcece21863a162e97783a62b55fe1 100644
--- a/libobjc/Makefile.in
+++ b/libobjc/Makefile.in
@@ -302,7 +302,7 @@ config.status: configure
 	CONFIG_SITE=no-such-file CC='$(CC)' AR='$(AR)' CFLAGS='$(CFLAGS)' \
 	CPPFLAGS='$(CPPFLAGS)' $(SHELL) config.status --recheck
 
-${srcdir}/configure: configure.in
+${srcdir}/configure: configure.ac
 	rm -f config.cache
 	cd ${srcdir} && autoconf
 
diff --git a/libobjc/configure.in b/libobjc/configure.ac
similarity index 100%
rename from libobjc/configure.in
rename to libobjc/configure.ac