diff --git a/components/drivers/pci/msi/irq.c b/components/drivers/pci/msi/irq.c
index ff49b28188..8e81e5d672 100644
--- a/components/drivers/pci/msi/irq.c
+++ b/components/drivers/pci/msi/irq.c
@@ -71,7 +71,7 @@ rt_err_t rt_pci_msi_setup_irqs(struct rt_pci_device *pdev, int nvec, int type)
         if (!err)
         {
             /* Get the first irq */
-            desc->irq = irq - irq_nr;
+            desc->irq = irq - (irq_nr - 1);
         }
 
         rt_bitmap_for_each_set_bit(msi_irq_map, irq_idx, MAX_HANDLERS)