diff --git a/cubesatsim/cubesatsim.h b/cubesatsim/cubesatsim.h
index 71fcc8a9..9f19bdd3 100644
--- a/cubesatsim/cubesatsim.h
+++ b/cubesatsim/cubesatsim.h
@@ -104,6 +104,7 @@ void read_ina219();
 void read_sensors();
 void get_tlm_ao7();
 void print_string(char *string);
+void start_payload() 
 
 extern int Encode_8b10b[][256];