diff --git a/cmake/system.cmake b/cmake/system.cmake
index 84445986b..cf29db54f 100644
--- a/cmake/system.cmake
+++ b/cmake/system.cmake
@@ -618,7 +618,7 @@ endif ()
 
 if (${F_COMPILER} STREQUAL "NAG" OR ${F_COMPILER} STREQUAL "CRAY" OR CMAKE_Fortran_COMPILER_ID MATCHES "LLVMFlang")
   set(FILTER_FLAGS "-msse3;-mssse3;-msse4.1;-mavx;-mavx2,-mskylake-avx512")
-  if (CMAKE_Fortran_COMPILER_ID STREQUAL "LLVMFlang")
+  if (CMAKE_Fortran_COMPILER_ID MATCHES "LLVMFlang")
     set(FILTER_FLAGS "${FILTER_FLAGS};-m32;-m64")
   endif ()
   foreach (FILTER_FLAG ${FILTER_FLAGS})