diff --git a/src/client/toks_client_acquire.c b/src/client/toks_client_acquire.c
index 81c3415..c4e0344 100644
--- a/src/client/toks_client_acquire.c
+++ b/src/client/toks_client_acquire.c
@@ -38,9 +38,13 @@ int32_t toks_client_acquire(struct toks_driver_ctx * dctx)
 	struct _nt_port_keys *	keys;
 	int64_t			millisecs;
 	nt_timeout		timeout;
+	const char *		refstr;
+	size_t			reflen;
 
-	hport = toks_get_driver_hservice(dctx);
-	keys  = toks_get_driver_keys(dctx);
+	hport  = toks_get_driver_hservice(dctx);
+	keys   = toks_get_driver_keys(dctx);
+	refstr = toks_get_driver_refstr(dctx);
+	reflen = 0;
 
 	ntapi->tt_aligned_block_memset(
 		&msg,0,sizeof(msg));
@@ -53,6 +57,15 @@ int32_t toks_client_acquire(struct toks_driver_ctx * dctx)
 	msg.data.ipcinfo.ctrlsvc.keys.reserved = toks_get_driver_tokpid(dctx);
 	msg.data.ipcinfo.hevent                = toks_get_driver_hevent(dctx);
 
+	if (refstr && (reflen = toks_strlen(refstr))) {
+		if (reflen > sizeof(msg.data.ipcinfo.ctrlsvc.keys.key))
+			reflen = sizeof(msg.data.ipcinfo.ctrlsvc.keys.key);
+
+		ntapi->tt_generic_memcpy(
+			msg.data.ipcinfo.ctrlsvc.keys.key,
+			refstr,reflen);
+	}
+
 	if (!(millisecs = toks_get_driver_timeout(dctx))) {
 		msg.data.ipcinfo.hevent = 0;