diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c
index 761a8158d7e87cf50782b00fdddf12dcab252fc7..d9c70f7ce6b3285ff145b6decdf91d3581b1b940 100644
--- a/hw/pci-host/piix.c
+++ b/hw/pci-host/piix.c
@@ -40,7 +40,7 @@
 
 /*
  * I440FX chipset data sheet.
- * http://download.intel.com/design/chipsets/datashts/29054901.pdf
+ * https://wiki.qemu.org/File:29054901.pdf
  */
 
 #define I440FX_PCI_HOST_BRIDGE(obj) \