diff --git a/libimagequant.spec b/libimagequant.spec
index a3ced7288857e43b46592a4e721b637dfd5b66da..1183778556246b388db247abe730e20f8dc6ee61 100644
--- a/libimagequant.spec
+++ b/libimagequant.spec
@@ -1,6 +1,6 @@
 Name:           libimagequant
 Version:        2.18.0
-Release:        1
+Release:        2
 Summary:        Palette quantization library
 License:        GPLv3+ and MIT
 URL:            https://github.com/ImageOptim/libimagequant
@@ -24,7 +24,11 @@ and header files for the application.
 %autosetup -p1
 
 %build
+%if "%toolchain" == "clang"
+%configure
+%else
 %configure --with-openmp
+%endif
 %make_build
 
 %install
@@ -45,6 +49,9 @@ rm -f %{buildroot}%{_libdir}/%{name}.a
 %{_libdir}/pkgconfig/imagequant.pc
 
 %changelog
+* Mon Oct 30 2023 yoo <sunyuechi@iscas.ac.cn> - 2.18.0-2
+- fix clang build error: openmp
+
 * Wed Apr 12 2023 liyanan <thistleslyn@163.com> - 2.18.0-1
 - Update to 2.18.0