diff --git a/sys/dev/smbus/smb/smb.c b/sys/dev/smbus/smb/smb.c
--- a/sys/dev/smbus/smb/smb.c
+++ b/sys/dev/smbus/smb/smb.c
@@ -126,7 +126,7 @@
 	if (!sc)
 		return (ENOMEM);
 
-	bzero(sc, sizeof(struct smb_softc *));
+	bzero(sc, sizeof(struct smb_softc));
 	unit = device_get_unit(dev);
 	sc->sc_dev = dev;
 	sc->sc_unit = unit;