diff --git a/Modules/_queuemodule.c b/Modules/_queuemodule.c
index 7bac461e98a50b6..7a4dc9b9ec2a8fd 100644
--- a/Modules/_queuemodule.c
+++ b/Modules/_queuemodule.c
@@ -94,7 +94,7 @@ resize_ringbuf(RingBuf *buf, Py_ssize_t capacity)
 {
     Py_ssize_t new_capacity = Py_MAX(INITIAL_RING_BUF_CAPACITY, capacity);
     if (new_capacity == buf->items_cap) {
-        return;
+        return 0;
     }
     assert(buf->num_items <= new_capacity);