diff --git a/ntp.spec b/ntp.spec
index 89504fde7162fdd75019e2ee780c5e615576583f..c5fd36062f5cfe0d458d697d538a8c493e50868f 100644
--- a/ntp.spec
+++ b/ntp.spec
@@ -2,7 +2,7 @@
 
 Name:                  ntp
 Version:               4.2.8p17
-Release:               3
+Release:               4
 Summary:               A protocol designed to synchronize the clocks of computers over a network
 License:               MIT and BSD and BSD with advertising
 URL:                   https://www.ntp.org/
@@ -29,6 +29,7 @@ Patch6:                backport-ntpd-abort-if-fail-to-drop-root.patch
 
 BuildRequires:	       libcap-devel openssl-devel libedit-devel libevent-devel pps-tools-devel
 BuildRequires:         autogen autogen-libopts-devel systemd gcc perl-generators perl-HTML-Parser
+BuildRequires:         mandoc
 Requires(pre):         shadow-utils autogen >= 5.18.16
 %{?systemd_requires}
 Recommends:            ntpstat timedatex
@@ -208,6 +209,12 @@ make check
 %{_mandir}/man8/*.8*
 
 %changelog
+* Thu Apr 17 2025 misaka00251 <liuxin@iscas.ac.cn> - 4.2.8p17-4
+- Type: bugfix
+- ID: NA
+- SUG: NA
+- DESC: Fix cannot locate converter for mdoc error
+
 * Tue Jan 23 2024 chengyechun <chengyehcun1@huawei.com> - 4.2.8p17-3
 - Type:bugfix
 - ID:NA