diff --git a/hw/xfree86/int10/generic.c b/hw/xfree86/int10/generic.c
index 46a1179..d863727 100644
--- a/hw/xfree86/int10/generic.c
+++ b/hw/xfree86/int10/generic.c
@@ -98,7 +98,7 @@ #endif
     base = INTPriv(pInt)->base = xnfalloc(SYS_BIOS);
 
     pvp = xf86GetPciInfoForEntity(entityIndex);
-    if (pvp) pInt->Tag = ((pciConfigPtr)(pvp->thisCard))->tag;
+    if (pvp) pInt->Tag = pciTag(pvp->bus, pvp->device, pvp->func);
 
     /*
      * we need to map video RAM MMIO as some chipsets map mmio