diff --git a/openair3/NAS/UE/UEprocess.c b/openair3/NAS/UE/UEprocess.c
index 248633c3a1..20af58dac6 100644
--- a/openair3/NAS/UE/UEprocess.c
+++ b/openair3/NAS/UE/UEprocess.c
@@ -71,6 +71,8 @@ static void _nas_signal_handler(int signal);
 
 static void _nas_clean(int usr_fd, int net_fd);
 
+uint8_t usim_test = 0;
+
 /****************************************************************************/
 /******************  E X P O R T E D    F U N C T I O N S  ******************/
 /****************************************************************************/