diff --git a/py/vm.c b/py/vm.c
index 167de1d0f0..f0afd6272b 100644
--- a/py/vm.c
+++ b/py/vm.c
@@ -326,7 +326,7 @@ dispatch_loop:
 
                     case MP_BC_DELETE_SUBSCR:
                         mp_delete_subscr(sp[-1], sp[0]);
-                        sp -= 3;
+                        sp -= 2;
                         break;
 
                     case MP_BC_DUP_TOP: