diff --git a/doc/fixes37.0 b/doc/fixes37.0
index 885b9cd01..d84be9cdd 100644
--- a/doc/fixes37.0
+++ b/doc/fixes37.0
@@ -1136,6 +1136,9 @@ Unix: when user name is used as default character name, keep hyphenated value
 	intact instead stripping off dash and whatever follows as if that
 	specified role/race/&c (worked once upon a time; broken since 3.3.0)
 Unix: add "ec2-user" to the list of user names 'sysconf' classifies as generic
+Unix: work-around a build issue in ubuntu 21.10 by using ifdef to skip the
+	define of warn_unused_result to empty string in tradstdc.h whenever
+	__linux__ is defined during build unless GCC_URWARN is also defined
 user_sounds: move the message hook from inside individual window display ports
 	to the core where it allows MSGTYP_NOSHOW msgtyp's to still trigger
 	sounds to correct a reported github issue; also fixes a past reported