diff --git a/os/rt/src/chschd.c b/os/rt/src/chschd.c
index 59599d287..1b9a5318f 100644
--- a/os/rt/src/chschd.c
+++ b/os/rt/src/chschd.c
@@ -394,7 +394,11 @@ void chSchObjectInit(os_instance_t *oip,
  * @iclass
  */
 thread_t *chSchReadyI(thread_t *tp) {
+#if CH_CFG_SMP_MODE == FALSE
   os_instance_t *oip = currcore;
+#else
+  os_instance_t *oip = tp->owner;
+#endif
 
   chDbgCheckClassI();
   chDbgCheck(tp != NULL);