diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 5207068..1515c5b 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1210,10 +1210,10 @@
 	save = resp->p;
 
 /*
- * Routine for encoding the result of a
- * "seqid-mutating" NFSv4 operation.  This is
- * where seqids are incremented, and the
- * replay cache is filled.
+ * Routine for encoding the result of a "seqid-mutating" NFSv4 operation.  This
+ * is where sequence id's are incremented, and the replay cache is filled.
+ * Note that we increment sequence id's here, at the last moment, so we're sure
+ * we know whether the error to be returned is a sequence id mutating error.
  */
 
 #define ENCODE_SEQID_OP_TAIL(stateowner) do {			\