diff --git a/include/ais_types.h b/include/ais_types.h
index 33b41834..6dba5f2b 100644
--- a/include/ais_types.h
+++ b/include/ais_types.h
@@ -52,6 +52,8 @@ typedef unsigned long long SaUint64T;
 
 typedef SaInt64T SaTimeT;
 
+#define SA_TIME_END ((SaTimeT)0x7fffffffffffffffull)
+
 #define SA_MAX_NAME_LENGTH 256
 typedef struct {
 		SaUint16T length;