diff --git a/cmake/modules/HandleLLVMOptions.cmake b/cmake/modules/HandleLLVMOptions.cmake
index 771ea852067..b8577f70666 100644
--- a/cmake/modules/HandleLLVMOptions.cmake
+++ b/cmake/modules/HandleLLVMOptions.cmake
@@ -343,12 +343,12 @@ if(LLVM_USE_SANITIZER)
   if (LLVM_ON_UNIX)
     if (LLVM_USE_SANITIZER STREQUAL "Address")
       append_common_sanitizer_flags()
-      add_flag_or_print_warning("-fsanitize=address" FSANITIZE_ADDRESS)
+      append("-fsanitize=address" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
     elseif (LLVM_USE_SANITIZER MATCHES "Memory(WithOrigins)?")
       append_common_sanitizer_flags()
-      add_flag_or_print_warning("-fsanitize=memory" FSANITIZE_MEMORY)
+      append("-fsanitize=memory" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
       if(LLVM_USE_SANITIZER STREQUAL "MemoryWithOrigins")
-        add_flag_or_print_warning("-fsanitize-memory-track-origins" FSANITIZE_MEMORY_TRACK_ORIGINS)
+        append("-fsanitize-memory-track-origins" CMAKE_C_FLAGS CMAKE_CXX_FLAGS)
       endif()
     else()
       message(WARNING "Unsupported value of LLVM_USE_SANITIZER: ${LLVM_USE_SANITIZER}")