diff --git a/sems.h.cmake b/sems.h.cmake
index 27c04571..5c71f414 100644
--- a/sems.h.cmake
+++ b/sems.h.cmake
@@ -51,13 +51,15 @@
 // 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
 
 #define NUM_MEDIA_PROCESSORS 1
 
+#define NUM_SESSION_PROCESSORS 10
+
 #define MAX_NET_DEVICES     32
 
 extern const char* progname;