diff --git a/lib/libc/stdlib/strfmon.3 b/lib/libc/stdlib/strfmon.3
index 7e5a9c02540..11b8e211bf6 100644
--- a/lib/libc/stdlib/strfmon.3
+++ b/lib/libc/stdlib/strfmon.3
@@ -159,3 +159,9 @@ function was implemented by
 This manual page was written by
 .An Jeroen Ruigrok van der Werven Aq asmodai@FreeBSD.org
 based on the standards' text.
+.Sh BUGS
+The
+.Fn strfmon
+function does not correctly handle multibyte characters in the
+.Fa format
+argument.