diff --git a/malware/Citadel.yar b/malware/Citadel.yar
index 8a9299a..2e548ef 100644
--- a/malware/Citadel.yar
+++ b/malware/Citadel.yar
@@ -1,3 +1,7 @@
+/*
+    This Yara ruleset is under the GNU-GPLv2 license (http://www.gnu.org/licenses/gpl-2.0.html) and open to any user or organization, as    long as you use it under this license.
+
+*/
 rule citadel13xy : banker
 {
 	meta: