diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index 94a8f914b237..8845f4b9621b 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -1801,7 +1801,7 @@ static ssize_t show_fw_ver(struct device *device, struct device_attribute *attr,
 {
 	struct mlx5_ib_dev *dev =
 		container_of(device, struct mlx5_ib_dev, ib_dev.dev);
-	return sprintf(buf, "%d.%d.%d\n", fw_rev_maj(dev->mdev),
+	return sprintf(buf, "%d.%d.%04d\n", fw_rev_maj(dev->mdev),
 		       fw_rev_min(dev->mdev), fw_rev_sub(dev->mdev));
 }