diff --git a/man2/keyctl.2 b/man2/keyctl.2
index 25c5ba77b..3f2f16f4a 100644
--- a/man2/keyctl.2
+++ b/man2/keyctl.2
@@ -1624,6 +1624,10 @@ did not exist, and
 .I arg3
 was zero (meaning don't create the key if it didn't exist).
 .TP
+.B ENOMEM
+One of kernel memory allocation routines failed during the execution of the
+syscall.
+.TP
 .B ENOTDIR
 A key of keyring type was expected but the ID of a key with
 a different type was provided.