diff --git a/CMakeLists.txt b/CMakeLists.txt
index 89c7eb329..32af812dd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -349,7 +349,7 @@ foreach(kind ${kinds})
   if ( CMAKE_Fortran_COMPILER_VERSION MATCHES "1[0-9]\.[0-9]*\.[0-9]*" AND CMAKE_Fortran_COMPILER_ID MATCHES "GNU")
     if(MPI_C_COMPILER MATCHES ".*mpich.*" )
       message(STATUS "Adding -fallow-argument-mismatch flag to compile with GCC >=10 and MPICH")
-      set_target_properties(${libTgt}_f PROPERTIES COMPILE_FLAGS "-fallow-argument-mismatch -w")
+      target_compile_options(${libTgt}_f PRIVATE "-fallow-argument-mismatch;-w")
     endif()
   endif()