diff --git a/libfcrypto.changes b/libfcrypto.changes
index 3834778..cd2d6ec 100644
--- a/libfcrypto.changes
+++ b/libfcrypto.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Sun Nov 19 13:51:48 UTC 2023 - Jan Engelhardt <jengelh@inai.de>
+
+- system-libs.patch requires autoconf rerun; add the dependency.
+
 -------------------------------------------------------------------
 Thu Dec 29 14:44:37 UTC 2022 - Jan Engelhardt <jengelh@inai.de>
 
diff --git a/libfcrypto.spec b/libfcrypto.spec
index 66e5e68..98b52b6 100644
--- a/libfcrypto.spec
+++ b/libfcrypto.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package libfcrypto
 #
-# Copyright (c) 2022 SUSE LLC
+# Copyright (c) 2023 SUSE LLC
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -28,6 +28,7 @@ Source:         https://github.com/libyal/libfcrypto/releases/download/%version/
 Source2:        https://github.com/libyal/libfcrypto/releases/download/%version/libfcrypto-alpha-%version.tar.gz.asc
 Source9:        %name.keyring
 Patch1:         system-libs.patch
+BuildRequires:  autoconf >= 2.71
 BuildRequires:  c_compiler
 BuildRequires:  gettext-tools >= 0.21
 BuildRequires:  libtool
@@ -63,7 +64,7 @@ applications that want to make use of libfcrypto.
 %autosetup -p1
 
 %build
-if [ ! -e configure ]; then ./autogen.sh; fi
+autoreconf -fi
 # see libcdata for version-sc
 echo "V_%version { global: *; };" >v.sym
 %configure --disable-static LDFLAGS="-Wl,--version-script=$PWD/v.sym"