diff --git a/man2/getdomainname.2 b/man2/getdomainname.2
index 33aadc316..ba459a1fe 100644
--- a/man2/getdomainname.2
+++ b/man2/getdomainname.2
@@ -96,9 +96,10 @@ pointed outside of user address space.
 was negative or too large.
 .TP
 .B EPERM
-the caller is unprivileged (Linux: does not have the
+The caller did not have the
 .B CAP_SYS_ADMIN
-capability).
+capability in the user namespace associated with its UTS namespace (see
+.BR namespaces (7)).
 .PP
 .BR getdomainname ()
 can fail with the following errors: