diff --git a/libasn1compiler/asn1c_misc.h b/libasn1compiler/asn1c_misc.h
index ee88cb1..4489ae1 100644
--- a/libasn1compiler/asn1c_misc.h
+++ b/libasn1compiler/asn1c_misc.h
@@ -10,6 +10,7 @@
   AMI_MASK_ONLY_SPACES	= 1,	/* Mask only spaces, everything else's safe */
   AMI_CHECK_RESERVED	= 2,	/* Check against reserved keywords */
   AMI_NODELIMITER       = 4,	/* Do not put delimiter, just concatenate */
+  AMI_USE_PREFIX        = 8,	/* Use Prefix when generating identifier */
 };
 char *asn1c_make_identifier(enum ami_flags_e, asn1p_expr_t *expr, ...);