diff --git a/Objects/frameobject.c b/Objects/frameobject.c
@@ -338,7 +338,7 @@ frame_block_unwind(PyFrameObject *f)
    assert(f->f_iblock > 0);
    f->f_iblock--;
    PyTryBlock *b = &f->f_blockstack[f->f_iblock];
-    int delta = (f->f_stacktop - f->f_valuestack) - b->b_level;
    while (delta > 0) {
        frame_stack_pop(f);
        delta--;