1 files changed, 3 insertions, 0 deletions

diff --git a/README b/README
index c220c00c2..240b319f1 100644
--- a/README
+++ b/README
@@ -135,6 +135,9 @@
 
     Creates a signature of file, but writes the output to the file "out".
 
+    If you use the option "--rfc1991", gnupg tries to me more compatible
+    to RFC1991 (pgp 2.x).
+
 
     Encrypt
     -------