diff --git a/.checkpackageignore b/.checkpackageignore
index 139a5ee81c..b5c30bf691 100644
--- a/.checkpackageignore
+++ b/.checkpackageignore
@@ -191,7 +191,6 @@ package/at/0001-Makefile.in-fix-make-install-for-non-root-don-t-stri.patch lib_p
 package/at/S99at lib_sysv.Indent lib_sysv.Variables
 package/attr/0001-build-with-older-GCCs.patch lib_patch.Upstream
 package/aumix/0001-fix-incorrect-makefile-am.patch lib_patch.Upstream
-package/autoconf/0001-dont-add-dirty-to-version.patch lib_patch.Upstream
 package/automake/0001-noman.patch lib_patch.Upstream
 package/avahi/S05avahi-setup.sh lib_sysv.Indent lib_sysv.Variables
 package/avahi/S50avahi-daemon lib_sysv.Indent lib_sysv.Variables
diff --git a/package/autoconf/0001-dont-add-dirty-to-version.patch b/package/autoconf/0001-dont-add-dirty-to-version.patch
index a1a50d2838..4ce3616d9d 100644
--- a/package/autoconf/0001-dont-add-dirty-to-version.patch
+++ b/package/autoconf/0001-dont-add-dirty-to-version.patch
@@ -10,19 +10,23 @@ commonly done in buildroot).
 The affect is that autoconf gets built as being version 2.65-dirty, which
 breaks programs (like Python) which explicitly checks for autoconf-2.65.
 
+Upstream: Not applicable (Buildroot specific)
+
 [Gustavo: update for autoconf 2.69]
 Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
 Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
+[Bernd: rebased for version 2.73]
+Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
 
 diff -Nura autoconf-2.69.orig/build-aux/git-version-gen autoconf-2.69/build-aux/git-version-gen
 --- autoconf-2.69.orig/build-aux/git-version-gen	2013-06-27 11:31:02.340200154 -0300
 +++ autoconf-2.69/build-aux/git-version-gen	2013-06-27 11:31:13.734577033 -0300
-@@ -210,7 +210,7 @@
+@@ -234,7 +234,7 @@
        *) # Append the suffix only if there isn't one already.
            case $v in
-             *-dirty) ;;
--            *) v="$v-dirty" ;;
-+            #*) v="$v-dirty" ;;
+             *-dirty | *-modified) ;;
+-            *) v="$v-modified" ;;
++            #*) v="$v-modified" ;;
            esac ;;
    esac
  fi
diff --git a/package/autoconf/autoconf.hash b/package/autoconf/autoconf.hash
index f94b2d9de5..96f36ec3bd 100644
--- a/package/autoconf/autoconf.hash
+++ b/package/autoconf/autoconf.hash
@@ -1,4 +1,5 @@
-# Locally calculated after checking pgp signature
-sha256  ba885c1319578d6c94d46e9b0dceb4014caafe2490e437a0dbca3f270a223f5a  autoconf-2.72.tar.xz
+# From https://lists.gnu.org/archive/html/autoconf/2026-03/msg00060.html
+sha256  9fd672b1c8425fac2fa67fa0477b990987268b90ff36d5f016dae57be0d6b52e  autoconf-2.73.tar.xz
+# Locally calculated
 sha256  3972dc9744f6499f0f9b2dbf76696f2ae7ad8af9b23dde66d6af86c9dfb36986  COPYINGv3
 sha256  1f1cde9fb68b9b3cff18c420894bec5bd4defacd700b7d13df54a887301e5350  COPYING.EXCEPTION
diff --git a/package/autoconf/autoconf.mk b/package/autoconf/autoconf.mk
index 48bfc80e7f..6f29bba146 100644
--- a/package/autoconf/autoconf.mk
+++ b/package/autoconf/autoconf.mk
@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-AUTOCONF_VERSION = 2.72
+AUTOCONF_VERSION = 2.73
 AUTOCONF_SOURCE = autoconf-$(AUTOCONF_VERSION).tar.xz
 AUTOCONF_SITE = $(BR2_GNU_MIRROR)/autoconf