diff --git a/sys/dev/ata/chipsets/ata-promise.c b/sys/dev/ata/chipsets/ata-promise.c
index a4e9414ca7e4..3054552c305b 100644
--- a/sys/dev/ata/chipsets/ata-promise.c
+++ b/sys/dev/ata/chipsets/ata-promise.c
@@ -628,7 +628,7 @@ ata_promise_mio_status(device_t dev)
     }
 
     /* read and acknowledge interrupt */
-    vector = (uint32_t)ctlr->chipset_data;
+    vector = (uint32_t)(uintptr_t)ctlr->chipset_data;
 
     /* read and clear interface status */
     status = ATA_INL(ctlr->r_res2, stat_reg);