diff --git a/.fmf/version b/.fmf/version
new file mode 100644
index 0000000..d00491f
--- /dev/null
+++ b/.fmf/version
@@ -0,0 +1 @@
+1
diff --git a/libomp18.spec b/libomp18.spec
index 1ecdd40..f812a84 100644
--- a/libomp18.spec
+++ b/libomp18.spec
@@ -51,7 +51,7 @@
 
 Name: %{pkg_name}
 Version: %{libomp_version}%{?rc_ver:~rc%{rc_ver}}%{?llvm_snapshot_version_suffix:~%{llvm_snapshot_version_suffix}}
-Release: 4%{?dist}
+Release: 5%{?dist}
 Summary: OpenMP runtime for clang
 
 License: Apache-2.0 WITH LLVM-exception OR NCSA
@@ -90,6 +90,9 @@ BuildRequires:	gnupg2
 
 # libomptarget needs the llvm cmake files
 BuildRequires:	%{llvm_pkg_name}-devel = %{version}
+%if %{with compat_build}
+Conflicts: libomp = %{maj_ver}
+%endif
 
 Requires: elfutils-libelf%{?isa}