diff --git a/nc_warnings.cmake b/nc_warnings.cmake
index 0e75ce4..01aa5d4 100644
--- a/nc_warnings.cmake
+++ b/nc_warnings.cmake
@@ -45,7 +45,8 @@ append_compile_flag(-Wtype-limits)
 append_compile_flag(-Wunused-but-set-variable)
 append_compile_flag(-Wunused-parameter)
 append_compile_flag(-Wpessimizing-move)
-append_compile_flag(-Wswitch-enum)
+# Don't use -Wswitch-enum, it's the same as -Wswitch but also warns if you use
+# a default. Just don't use a default if that's something you want to catch.
 append_compile_flag(-Wswitch)
 
 # dont use unsafe-loop-optimisations as there are too many false positives