diff --git a/exim.spec b/exim.spec
index cbc3e732c50408601520415236f241c6e83d74c6..f5cd3e605e4e8f556509bf1d1ffef0db1abc3aa5 100644
--- a/exim.spec
+++ b/exim.spec
@@ -4,7 +4,7 @@
 Summary:          The exim mail transfer agent
 Name:             exim
 Version:          4.97.1
-Release:          3
+Release:          4
 License:          GPLv2+
 Url:              https://www.exim.org/
 
@@ -191,8 +191,13 @@ popd
 	export PIC=-fPIC
 %endif
 
+%if "%toolchain" == "clang"
+	%global make_opts PERL_CC=clang CC=clang
+%endif
+
+
 export LDFLAGS="%{?__global_ldflags} %{?_hardened_build:-pie -Wl,-z,relro,-z,now}"
-make _lib=%{_lib} FULLECHO=
+make %{?make_opts} _lib=%{_lib} FULLECHO=
 
 %install
 mkdir -p $RPM_BUILD_ROOT%{_sbindir}
@@ -484,6 +489,9 @@ fi
 %{_sysconfdir}/cron.daily/greylist-tidy.sh
 
 %changelog
+* Fri Jan 24 2025 QiuWenjian <wenjian.oerv@isrc.iscas.ac.cn> - 4.97.1-4
+- Fix clang building error
+
 * Tue Jul 9 2024 zhangxianting <zhangxianting@uniontech.com> - 4.97.1-3
 - fix CVE-2024-39929