diff --git a/net/af-xdp.c b/net/af-xdp.c
index 01c5fb914e..d022534d76 100644
--- a/net/af-xdp.c
+++ b/net/af-xdp.c
@@ -323,7 +323,7 @@ static int af_xdp_umem_create(AFXDPState *s, int sock_fd, Error **errp)
 
     s->pool = g_new(uint64_t, n_descs);
     /* Fill the pool in the opposite order, because it's a LIFO queue. */
-    for (i = n_descs; i >= 0; i--) {
+    for (i = n_descs - 1; i >= 0; i--) {
         s->pool[i] = i * XSK_UMEM__DEFAULT_FRAME_SIZE;
     }
     s->n_pool = n_descs;