diff --git a/sys/powerpc/powermac/ata_kauai.c b/sys/powerpc/powermac/ata_kauai.c
index 655809579fd0..b906d4eae4e9 100644
--- a/sys/powerpc/powermac/ata_kauai.c
+++ b/sys/powerpc/powermac/ata_kauai.c
@@ -90,10 +90,11 @@ static driver_t ata_kauai_driver = {
 
 DRIVER_MODULE(ata, pci, ata_kauai_driver, ata_devclass, 0, 0);
 
-static void
+static int
 ata_kauai_locknoop(struct ata_channel *ch, int type)
 {
 	/* XXX SMP ? */
+	return (0);
 }
 
 static void
diff --git a/sys/powerpc/powermac/ata_macio.c b/sys/powerpc/powermac/ata_macio.c
index 5fb2865b168d..992c254fa65c 100644
--- a/sys/powerpc/powermac/ata_macio.c
+++ b/sys/powerpc/powermac/ata_macio.c
@@ -80,10 +80,11 @@ static driver_t ata_macio_driver = {
 
 DRIVER_MODULE(ata, macio, ata_macio_driver, ata_devclass, 0, 0);
 
-static void
+static int
 ata_macio_locknoop(struct ata_channel *ch, int type)
 {
 	/* XXX SMP ? */
+	return (0);
 }
 
 static void