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-rw-r--r--src/plugins/memif/device.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/plugins/memif/device.c b/src/plugins/memif/device.c
index befc0b50eab..7c1ac361789 100644
--- a/src/plugins/memif/device.c
+++ b/src/plugins/memif/device.c
@@ -315,8 +315,8 @@ memif_interface_tx_zc_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
u16 head, tail;
retry:
- slot = tail = __atomic_load_n (&ring->tail, __ATOMIC_ACQUIRE);
- head = ring->head;
+ tail = __atomic_load_n (&ring->tail, __ATOMIC_ACQUIRE);
+ slot = head = ring->head;
n_free = tail - mq->last_tail;
if (n_free >= 16)