diff --git a/addrcheck/ac_main.c b/addrcheck/ac_main.c
index bf0da4f..7eb355d 100644
--- a/addrcheck/ac_main.c
+++ b/addrcheck/ac_main.c
@@ -33,6 +33,8 @@
 #include "ac_include.h"
 //#include "vg_profile.c"
 
+VG_DETERMINE_INTERFACE_VERSION
+
 /*------------------------------------------------------------*/
 /*--- Defns                                                ---*/
 /*------------------------------------------------------------*/