diff --git a/meson.build b/meson.build
index b2045b46..3f49c1e1 100644
--- a/meson.build
+++ b/meson.build
@@ -77,6 +77,10 @@ foreach extra_arg : extra_flags
   endif
 endforeach
 
+# some clang don't have charconv, but we need it.
+# https://github.com/djcb/mu/issues/2347
+cxx.check_header('charconv', required:true)
+
 ################################################################################
 # config.h setup
 #