diff --git a/libidn.spec b/libidn.spec
index 31b578dae0ca568fc404d21d50d2c43c99f148ec..90a4939252bd6b5deefcd8d315aed185db611b5f 100644
--- a/libidn.spec
+++ b/libidn.spec
@@ -1,7 +1,7 @@
 %bcond_with java 
 Name:     libidn
 Version:  1.38
-Release:  1
+Release:  2
 Summary:  GNU IDN Library - Libidn
 License:  LGPLv2+ and GPLv3+ and GFDL
 URL:	  http://www.gnu.org/software/libidn/
@@ -9,6 +9,7 @@ Source0:  http://ftp.gnu.org/gnu/libidn/libidn-%{version}.tar.gz
 
 BuildRequires: autoconf autoconf-archive automake libtool texinfo
 BuildRequires: gcc gettext gettext-devel pkgconfig help2man emacs
+BuildRequires: gtk-doc
 
 Provides:  bundled(gnulib)
 Obsoletes: emacs-libidn < 1.30-4
@@ -118,6 +119,9 @@ rm -rf $RPM_BUILD_ROOT%{_javadir}/libidn*.jar
 %{_infodir}/%{name}.info.gz
 
 %changelog
+* Mon Dec 27 2021 fuanan <fuanan3@huawei.com> - 1.38-2
+- add BuildRequires gtk-doc
+
 * Tue Nov 30 2021 fuanan <fuanan3@huawei.com> - 1.38-1
 - Type:enhancement
 - ID:NA