diff --git a/autoconf-el.changes b/autoconf-el.changes
index 107dbff..bdc5a4b 100644
--- a/autoconf-el.changes
+++ b/autoconf-el.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Thu Feb  9 12:12:26 UTC 2017 - dimstar@opensuse.org
+
+- Explicitly buildrequire m4: there is a plan to remove it from the
+  implicit buildroot configuration (just like autoconf itself is
+  no longer part of a long time already).
+
 -------------------------------------------------------------------
 Tue Sep  1 08:39:18 UTC 2015 - dimstar@opensuse.org
 
diff --git a/autoconf-el.spec b/autoconf-el.spec
index 8e21557..65d58f4 100644
--- a/autoconf-el.spec
+++ b/autoconf-el.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package autoconf-el
 #
-# Copyright (c) 2015 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2017 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
diff --git a/autoconf-testsuite.changes b/autoconf-testsuite.changes
index 107dbff..bdc5a4b 100644
--- a/autoconf-testsuite.changes
+++ b/autoconf-testsuite.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Thu Feb  9 12:12:26 UTC 2017 - dimstar@opensuse.org
+
+- Explicitly buildrequire m4: there is a plan to remove it from the
+  implicit buildroot configuration (just like autoconf itself is
+  no longer part of a long time already).
+
 -------------------------------------------------------------------
 Tue Sep  1 08:39:18 UTC 2015 - dimstar@opensuse.org
 
diff --git a/autoconf-testsuite.spec b/autoconf-testsuite.spec
index c44669c..2eb89a0 100644
--- a/autoconf-testsuite.spec
+++ b/autoconf-testsuite.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package autoconf-testsuite
 #
-# Copyright (c) 2015 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2017 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -30,6 +30,7 @@ Patch0:         autoreconf-ltdl.diff
 # PATCH-FIX-UPSTREAM autoconf-perl-5.17-fixes.patch dimstar@opensuse.org -- autoscan: port to perl 5.17 (with perl 5.22, it is now fatal).
 Patch1:         autoconf-perl-5.17-fixes.patch
 BuildRequires:  help2man
+BuildRequires:  m4 >= 1.4.6
 Requires:       info
 Requires:       m4 >= 1.4.6
 Requires:       perl >= 5.6
diff --git a/autoconf.changes b/autoconf.changes
index 107dbff..bdc5a4b 100644
--- a/autoconf.changes
+++ b/autoconf.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Thu Feb  9 12:12:26 UTC 2017 - dimstar@opensuse.org
+
+- Explicitly buildrequire m4: there is a plan to remove it from the
+  implicit buildroot configuration (just like autoconf itself is
+  no longer part of a long time already).
+
 -------------------------------------------------------------------
 Tue Sep  1 08:39:18 UTC 2015 - dimstar@opensuse.org
 
diff --git a/autoconf.spec b/autoconf.spec
index c6862a1..9149480 100644
--- a/autoconf.spec
+++ b/autoconf.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package autoconf
 #
-# Copyright (c) 2015 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2017 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -30,6 +30,7 @@ Patch0:         autoreconf-ltdl.diff
 # PATCH-FIX-UPSTREAM autoconf-perl-5.17-fixes.patch dimstar@opensuse.org -- autoscan: port to perl 5.17 (with perl 5.22, it is now fatal).
 Patch1:         autoconf-perl-5.17-fixes.patch
 BuildRequires:  help2man
+BuildRequires:  m4 >= 1.4.6
 Requires:       info
 Requires:       m4 >= 1.4.6
 Requires:       perl >= 5.6