diff --git a/include/toksvc/toksvc.h b/include/toksvc/toksvc.h
index b06b73f..b416f4e 100644
--- a/include/toksvc/toksvc.h
+++ b/include/toksvc/toksvc.h
@@ -205,6 +205,9 @@ toks_api void toks_free_driver_ctx      (struct toks_driver_ctx *);
 toks_api void toks_driver_set_timeout   (struct toks_driver_ctx *, int64_t millisecs);
 toks_api void toks_driver_unset_timeout (struct toks_driver_ctx *);
 
+toks_api void toks_driver_set_refstr    (struct toks_driver_ctx *, const char *);
+toks_api void toks_driver_unset_refstr  (struct toks_driver_ctx *);
+
 /* core api */
 toks_api int  toks_service_abort        (struct toks_driver_ctx *);
 toks_api int  toks_service_ioctl        (struct toks_driver_ctx *, uint32_t ctlcode, uintptr_t * data, void * any);
diff --git a/src/driver/toks_driver_ctx.c b/src/driver/toks_driver_ctx.c
index 1a8c53d..38475e3 100644
--- a/src/driver/toks_driver_ctx.c
+++ b/src/driver/toks_driver_ctx.c
@@ -1067,6 +1067,16 @@ void toks_driver_unset_timeout(struct toks_driver_ctx * dctx)
 	toks_set_driver_timeout(dctx,(-1));
 }
 
+void toks_driver_set_refstr(struct toks_driver_ctx * dctx, const char * refstr)
+{
+	toks_set_driver_refstr(dctx,refstr);
+}
+
+void toks_driver_unset_refstr(struct toks_driver_ctx * dctx)
+{
+	toks_set_driver_refstr(dctx,0);
+}
+
 const struct toks_source_version * toks_source_version(void)
 {
 	return &toks_src_version;