diff --git a/openbsc/include/openbsc/bsc_nat_sccp.h b/openbsc/include/openbsc/bsc_nat_sccp.h
index 34aa632..0561df1 100644
--- a/openbsc/include/openbsc/bsc_nat_sccp.h
+++ b/openbsc/include/openbsc/bsc_nat_sccp.h
@@ -41,6 +41,9 @@
 	/* destination local reference */
 	struct sccp_source_reference *dest_local_ref;
 
+	/* original value */
+	struct sccp_source_reference original_dest_ref;
+
 	/* called ssn number */
 	int called_ssn;