diff --git a/lib/utils/common.h b/lib/utils/common.h
index f695982..10c8863 100644
--- a/lib/utils/common.h
+++ b/lib/utils/common.h
@@ -16,7 +16,7 @@ namespace crc{
 }
 
 extern const char* access_code;
-constexpr int access_code_front_trim = 8;
+constexpr int access_code_front_trim = 8*4;
 extern const char* trimmed_access_code;
 
 }