1 files changed, 8 insertions, 0 deletions
diff --git a/py/vm.c b/py/vm.c
index 748e0e935b..1d47076dfb 100644
--- a/py/vm.c
+++ b/py/vm.c
@@ -428,6 +428,14 @@ unwind_jump:
                         //sp -= 3; // pop 3 exception values
                         break;
 
+                    case MP_BC_NOT:
+                        if (TOP() == mp_const_true) {
+                            SET_TOP(mp_const_false);
+                        } else {
+                            SET_TOP(mp_const_true);
+                        }
+                        break;
+
                     case MP_BC_UNARY_OP:
                         unum = *ip++;
                         SET_TOP(rt_unary_op(unum, TOP()));