diff --git a/man2/setreuid.2 b/man2/setreuid.2
index 034a193f8..e3aa64166 100644
--- a/man2/setreuid.2
+++ b/man2/setreuid.2
@@ -59,7 +59,12 @@ Feature Test Macro Requirements for glibc (see
 .sp
 .BR setreuid (),
 .BR setregid ():
-_BSD_SOURCE || _XOPEN_SOURCE\ >=\ 500
+.RS 4
+.ad l
+_BSD_SOURCE || _XOPEN_SOURCE\ >=\ 500 ||
+_XOPEN_SOURCE\ &&\ _XOPEN_SOURCE_EXTENDED
+.ad
+.RE
 .SH DESCRIPTION
 .BR setreuid ()
 sets real and effective user IDs of the calling process.