diff --git a/fs/cifs/README b/fs/cifs/README
index 68b5c11..bd2343d 100644
--- a/fs/cifs/README
+++ b/fs/cifs/README
@@ -542,10 +542,20 @@
 			hashing mechanisms (as "must use") on the other hand 
 			does not make much sense. Default flags are 
 				0x07007 
-			(NTLM, NTLMv2 and packet signing allowed).  Maximum 
+			(NTLM, NTLMv2 and packet signing allowed).  The maximum 
 			allowable flags if you want to allow mounts to servers
 			using weaker password hashes is 0x37037 (lanman,
-			plaintext, ntlm, ntlmv2, signing allowed):
+			plaintext, ntlm, ntlmv2, signing allowed).  Some
+			SecurityFlags require the corresponding menuconfig
+			options to be enabled (lanman and plaintext require
+			CONFIG_CIFS_WEAK_PW_HASH for example).  Enabling
+			plaintext authentication currently requires also
+			enabling lanman authentication in the security flags
+			because the cifs module only supports sending
+			laintext passwords using the older lanman dialect
+			form of the session setup SMB.  (e.g. for authentication
+			using plain text passwords, set the SecurityFlags
+			to 0x30030):
  
 			may use packet signing 				0x00001
 			must use packet signing				0x01001