diff --git a/net/rxrpc/key.c b/net/rxrpc/key.c
index 18c737a61d80..0a4e28477ad9 100644
--- a/net/rxrpc/key.c
+++ b/net/rxrpc/key.c
@@ -1065,7 +1065,7 @@ static long rxrpc_read(const struct key *key,
 
 		switch (token->security_index) {
 		case RXRPC_SECURITY_RXKAD:
-			toksize += 8 * 4;	/* viceid, kvno, key*2, begin,
+			toksize += 9 * 4;	/* viceid, kvno, key*2 + len, begin,
 						 * end, primary, tktlen */
 			toksize += RND(token->kad->ticket_len);
 			break;