diff --git a/OpenShadingLanguage.changes b/OpenShadingLanguage.changes
index 5b1e031..a3808d7 100644
--- a/OpenShadingLanguage.changes
+++ b/OpenShadingLanguage.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Sun Apr 24 17:13:32 UTC 2022 - Hans-Peter Jansen <hpj@urpla.net>
+
+- Fix build by requiring llvm and clang 12 versions
+
 -------------------------------------------------------------------
 Sun Apr 10 10:06:53 UTC 2022 - Dirk Müller <dmueller@suse.com>
 
diff --git a/OpenShadingLanguage.spec b/OpenShadingLanguage.spec
index 9cbeb39..c9e63ff 100644
--- a/OpenShadingLanguage.spec
+++ b/OpenShadingLanguage.spec
@@ -34,7 +34,14 @@ Source1:        https://creativecommons.org/licenses/by/3.0/legalcode.txt#/CC-BY
 BuildRequires:  OpenEXR-devel
 BuildRequires:  OpenImageIO
 BuildRequires:  bison
-BuildRequires:  clang-devel >= 7
+%if 0%{suse_version} > 1500
+# llvm 13 removed some interfaces
+BuildRequires:  clang12-devel
+BuildRequires:  llvm12-devel
+%else
+BuildRequires:  clang-devel > 7
+BuildRequires:  llvm-devel > 7
+%endif
 BuildRequires:  cmake >= 3.12
 BuildRequires:  flex
 BuildRequires:  gcc-c++