diff --git a/src/vm.c b/src/vm.c
index fc4d11891..c2b461fd0 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -735,7 +735,7 @@ mrb_run(mrb_state *mrb, struct RProc *proc, mrb_value self)
         mrb->arena_idx = ai;
         if (mrb->exc) goto L_RAISE;
         /* pop stackpos */
-        mrb->stack = mrb->stbase + ci->stackidx;
+        regs = mrb->stack = mrb->stbase + ci->stackidx;
         cipop(mrb);
         NEXT;
       }
@@ -1040,7 +1040,7 @@ mrb_run(mrb_state *mrb, struct RProc *proc, mrb_value self)
 	  }
           if (ci == mrb->cibase) {
             if (ci->ridx == 0) {
-	      mrb->stack = mrb->stbase;
+	      regs = mrb->stack = mrb->stbase;
 	      goto L_STOP;
 	    }
             break;