diff --git a/core/sems.h b/core/sems.h
index 9e003340..3ff50d56 100644
--- a/core/sems.h
+++ b/core/sems.h
@@ -53,7 +53,7 @@
 // session considered dead after 5 minutes no RTP
 #define DEAD_RTP_TIME       5*60
 
-/* Session Timer defaul configuration: */
+/* Session Timer default configuration: */
 #define DEFAULT_ENABLE_SESSION_TIMER 1
 #define SESSION_EXPIRES              60 // seconds
 #define MINIMUM_TIMER                5   //seconds