diff --git a/doc/asn1c-usage.lyx b/doc/asn1c-usage.lyx
index 438e7b0..27736a2 100644
--- a/doc/asn1c-usage.lyx
+++ b/doc/asn1c-usage.lyx
@@ -55,7 +55,7 @@
 \layout Standard
 
 \backslash 
-extramarks{$Revision$}{}
+extramarks{$Revision$ -- describes asn1c-0.9.3}{}
 \end_inset