diff --git a/py/vm.c b/py/vm.c
index bcd13389e9..8e16c12ffe 100644
--- a/py/vm.c
+++ b/py/vm.c
@@ -309,6 +309,11 @@ dispatch_loop:
                         sp -= 3;
                         break;
 
+                    case MP_BC_DELETE_FAST_N:
+                        DECODE_UINT;
+                        fastn[-unum] = MP_OBJ_NULL;
+                        break;
+
                     case MP_BC_DELETE_NAME:
                         DECODE_QSTR;
                         mp_delete_name(qst);