diff --git a/src/libcharon/plugins/whitelist/whitelist_msg.h b/src/libcharon/plugins/whitelist/whitelist_msg.h
index c710548b2..6b6eb1530 100644
--- a/src/libcharon/plugins/whitelist/whitelist_msg.h
+++ b/src/libcharon/plugins/whitelist/whitelist_msg.h
@@ -53,7 +53,7 @@ struct whitelist_msg_t {
 	/** message type */
 	int type;
 	/** null terminated identity */
-	char id[128];
+	char id[256];
 } __attribute__((packed));
 
 #endif /** WHITELIST_MSG_H_ @}*/