diff --git a/Modules/_collectionsmodule.c b/Modules/_collectionsmodule.c
index 0bc0e98ed88..8494a47d872 100644
--- a/Modules/_collectionsmodule.c
+++ b/Modules/_collectionsmodule.c
@@ -783,7 +783,6 @@ deque_item(dequeobject *deque, Py_ssize_t i)
         assert(i >= 0);
         n = (Py_ssize_t)((unsigned) i / BLOCKLEN);
         i = (Py_ssize_t)((unsigned) i % BLOCKLEN);
-        i %= BLOCKLEN;
         if (index < (Py_SIZE(deque) >> 1)) {
             b = deque->leftblock;
             while (n--)