diff --git a/autoconf213.changes b/autoconf213.changes
index 30e2452..0ab89d7 100644
--- a/autoconf213.changes
+++ b/autoconf213.changes
@@ -1,3 +1,9 @@
+-------------------------------------------------------------------
+Thu Feb  9 12:16:15 UTC 2017 - dimstar@opensuse.org
+
+- Explicitly BuildRequire m4: do not rely on the build system to
+  contain this dependency for us.
+
 -------------------------------------------------------------------
 Fri Feb  6 19:21:59 UTC 2015 - dimstar@opensuse.org
 
diff --git a/autoconf213.spec b/autoconf213.spec
index 5f0011d..c6dafc3 100644
--- a/autoconf213.spec
+++ b/autoconf213.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package autoconf213
 #
-# 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
@@ -18,6 +18,7 @@
 
 Name:           autoconf213
 Url:            http://www.gnu.org/software/autoconf
+BuildRequires:  m4 >= 1.1
 Requires:       gawk
 Requires:       m4 >= 1.1
 Requires:       mktemp