diff --git a/openmp/CMakeLists.txt b/openmp/CMakeLists.txt
--- a/openmp/CMakeLists.txt
+++ b/openmp/CMakeLists.txt
@@ -75,6 +75,14 @@
        ${ENABLE_LIBOMPTARGET})
 option(OPENMP_ENABLE_LIBOMP_PROFILING "Enable time profiling for libomp." OFF)
 
+# Header install location
+if(${OPENMP_STANDALONE_BUILD})
+  set(LIBOMP_HEADERS_INSTALL_PATH "${CMAKE_INSTALL_INCLUDEDIR}")
+else()
+  string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION ${PACKAGE_VERSION})
+  set(LIBOMP_HEADERS_INSTALL_PATH "${OPENMP_INSTALL_LIBDIR}/clang/${CLANG_VERSION}/include")
+endif()
+
 # Build host runtime library, after LIBOMPTARGET variables are set since they are needed
 # to enable time profiling support in the OpenMP runtime.
 add_subdirectory(runtime)
diff --git a/openmp/runtime/src/CMakeLists.txt b/openmp/runtime/src/CMakeLists.txt
--- a/openmp/runtime/src/CMakeLists.txt
+++ b/openmp/runtime/src/CMakeLists.txt
@@ -355,12 +355,6 @@
 # Install rules
 # We want to install libomp in ${DESTDIR}/${CMAKE_INSTALL_FULL_LIBDIR}
 # We want to install headers in ${DESTDIR}/${CMAKE_INSTALL_FULL_INCLUDEDIR}
-if(${OPENMP_STANDALONE_BUILD})
-  set(LIBOMP_HEADERS_INSTALL_PATH "${CMAKE_INSTALL_INCLUDEDIR}")
-else()
-  string(REGEX MATCH "[0-9]+\\.[0-9]+(\\.[0-9]+)?" CLANG_VERSION ${PACKAGE_VERSION})
-  set(LIBOMP_HEADERS_INSTALL_PATH "${OPENMP_INSTALL_LIBDIR}/clang/${CLANG_VERSION}/include")
-endif()
 if(WIN32)
   install(TARGETS omp RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}")
   install(TARGETS ${LIBOMP_IMP_LIB_TARGET} ARCHIVE DESTINATION "${OPENMP_INSTALL_LIBDIR}")
diff --git a/openmp/tools/multiplex/CMakeLists.txt b/openmp/tools/multiplex/CMakeLists.txt
--- a/openmp/tools/multiplex/CMakeLists.txt
+++ b/openmp/tools/multiplex/CMakeLists.txt
@@ -4,7 +4,7 @@
   add_library(ompt-multiplex INTERFACE)
   target_include_directories(ompt-multiplex INTERFACE ${CMAKE_CURRENT_SOURCE_DIR})
 
-  install(FILES ompt-multiplex.h DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}")
+  install(FILES ompt-multiplex.h DESTINATION "${LIBOMP_HEADERS_INSTALL_PATH}")
 
   add_subdirectory(tests)
 endif()