diff --git a/sys/living/comm.h b/sys/living/comm.h
index 7cb7388..064113a 100644
--- a/sys/living/comm.h
+++ b/sys/living/comm.h
@@ -23,12 +23,14 @@
 #define MSG_DONT_WRAP    4096
 #define MSG_DONT_IGNORE  8192
 #define MSG_ALL_SENSES   16384 // all relevant senses, not one of them
+#define MSG_ALERT        0x8000 // signal an alert to client (e.g. audio)
 // Flags < 1048576 (2^20) reserviert fuer Flags
 #define MSG_ALL_BS_FLAGS (BS_LEAVE_MY_LFS | BS_SINGLE_SPACE | BS_BLOCK\
                           | BS_NO_PARINDENT | BS_INDENT_ONCE\
                           |BS_PREPEND_INDENT)
 #define MSG_ALL_FLAGS (MSG_DONT_BUFFER | MSG_DONT_STORE | MSG_DONT_WRAP\
-                      | MSG_DONT_IGNORE | MSG_ALL_SENSES | MSG_ALL_BS_FLAGS)
+                      | MSG_DONT_IGNORE | MSG_ALL_SENSES | MSG_ALERT\
+                      | MSG_ALL_BS_FLAGS)
 
 // Nachrichtentypen, Werte ab 2^20
 #define MT_UNKNOWN    0