diff --git a/man2/setuid.2 b/man2/setuid.2
index 14b157aec..b062a8220 100644
--- a/man2/setuid.2
+++ b/man2/setuid.2
@@ -89,6 +89,12 @@ bring the number of processes belonging to the real user ID
 over the caller's
 .B RLIMIT_NPROC
 resource limit.
+Since Linux 3.1, this error case no longer occurs
+(but robust applications should check for this error);
+see the description of
+.B EAGAIN
+in
+.BR execve (2).
 .TP
 .B EPERM
 The user is not privileged (Linux: does not have the