diff --git a/components/drivers/pci/msi/irq.c b/components/drivers/pci/msi/irq.c
index 273f5c9bf9..ff49b28188 100644
--- a/components/drivers/pci/msi/irq.c
+++ b/components/drivers/pci/msi/irq.c
@@ -34,7 +34,7 @@ rt_err_t rt_pci_msi_setup_irqs(struct rt_pci_device *pdev, int nvec, int type)
 
     if (type == PCIY_MSI)
     {
-        int last_irq = -1;
+        int last_irq = -1, irq_idx;
         rt_size_t irq_nr;
 
         desc = rt_pci_msi_first_desc(pdev);
@@ -74,12 +74,12 @@ rt_err_t rt_pci_msi_setup_irqs(struct rt_pci_device *pdev, int nvec, int type)
             desc->irq = irq - irq_nr;
         }
 
-        rt_bitmap_for_each_set_bit(msi_irq_map, irq, MAX_HANDLERS)
+        rt_bitmap_for_each_set_bit(msi_irq_map, irq_idx, MAX_HANDLERS)
         {
-            msi_pic->ops->irq_free_msi(msi_pic, irq);
+            msi_pic->ops->irq_free_msi(msi_pic, irq_idx);
 
             /* Free bit so the next user doesn't need to bzero */
-            rt_bitmap_clear_bit(msi_irq_map, irq);
+            rt_bitmap_clear_bit(msi_irq_map, irq_idx);
         }
 
         rt_hw_spin_unlock(&msi_irq_map_lock.lock);