diff --git a/sys/dev/iicbus/iicbb.c b/sys/dev/iicbus/iicbb.c
index 977d52a01249..ed1d7b846d31 100644
--- a/sys/dev/iicbus/iicbb.c
+++ b/sys/dev/iicbus/iicbb.c
@@ -149,22 +149,9 @@ iicbb_attach(device_t dev)
 static int
 iicbb_detach(device_t dev)
 {
-	struct iicbb_softc *sc = (struct iicbb_softc *)device_get_softc(dev);
-	device_t child;
 
-	/*
-	 * We need to save child because the detach indirectly causes
-	 * sc->iicbus to be zeroed.  Since we added the device
-	 * unconditionally in iicbb_attach, we need to make sure we
-	 * delete it here.  See iicbb_child_detached.  We need that
-	 * callback in case newbus detached our children w/o detaching
-	 * us (say iicbus is a module and unloaded w/o iicbb being
-	 * unloaded).
-	 */
-	child = sc->iicbus;
 	bus_generic_detach(dev);
-	if (child)
-		device_delete_child(dev, child);
+	device_delete_children(dev);
 
 	return (0);
 }
diff --git a/sys/dev/iicbus/iicbus.c b/sys/dev/iicbus/iicbus.c
index 4ee480e677e6..df29b09b4c06 100644
--- a/sys/dev/iicbus/iicbus.c
+++ b/sys/dev/iicbus/iicbus.c
@@ -135,6 +135,7 @@ iicbus_detach(device_t dev)
 
 	iicbus_reset(dev, IIC_FASTEST, 0, NULL);
 	bus_generic_detach(dev);
+	device_delete_children(dev);
 	mtx_destroy(&sc->lock);
 	return (0);
 }
diff --git a/sys/dev/iicbus/iicoc.c b/sys/dev/iicbus/iicoc.c
index 45f1692fa479..c55d6fe4dc89 100644
--- a/sys/dev/iicbus/iicoc.c
+++ b/sys/dev/iicbus/iicoc.c
@@ -229,6 +229,7 @@ static int
 iicoc_detach(device_t dev)
 {
 	bus_generic_detach(dev);
+	device_delete_children(dev);
 
 	return (0);
 }
diff --git a/sys/dev/iicbus/iicsmb.c b/sys/dev/iicbus/iicsmb.c
index 27f1d2b05529..d8f35c6e3baf 100644
--- a/sys/dev/iicbus/iicsmb.c
+++ b/sys/dev/iicbus/iicsmb.c
@@ -167,11 +167,9 @@ static int
 iicsmb_detach(device_t dev)
 {
 	struct iicsmb_softc *sc = (struct iicsmb_softc *)device_get_softc(dev);
-	
+
 	bus_generic_detach(dev);
-	if (sc->smbus) {
-		device_delete_child(dev, sc->smbus);
-	}
+	device_delete_children(dev);
 	mtx_destroy(&sc->lock);
 
 	return (0);