diff --git a/CMakeLists.txt b/CMakeLists.txt
index c37c9ad67..17804c584 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -244,10 +244,11 @@ if(NOT MSVC AND NOT HAIKU)
   add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wduplicated-branches)
   add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wlogical-op)
   add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wrestrict)
-  add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wshadow=local)
+  add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wshadow=local) # global has too many occurences
   add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wthread-safety)
-  # TODO: Enable for C++ code except gtest
-  #add_cxx_compiler_flag_if_supported(OUR_FLAGS_OWN "-Wuseless-cast")
+  # add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wdouble-promotion) # Many occurences
+  # add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wnull-dereference) # Many occurences
+  # add_c_compiler_flag_if_supported(OUR_FLAGS_OWN -Wuseless-cast) # TODO: Enable for C++ code except gtest
 endif()
 
 if(MSVC)