diff --git a/sys/dev/mii/mii.c b/sys/dev/mii/mii.c
index dfa68c414373..2c99bc07e6de 100644
--- a/sys/dev/mii/mii.c
+++ b/sys/dev/mii/mii.c
@@ -56,10 +56,13 @@ MODULE_VERSION(miibus, 1);
 
 #include "miibus_if.h"
 
+static device_attach_t miibus_attach;
 static bus_child_location_str_t miibus_child_location_str;
 static bus_child_pnpinfo_str_t miibus_child_pnpinfo_str;
+static device_detach_t miibus_detach;
 static bus_hinted_child_t miibus_hinted_child;
 static bus_print_child_t miibus_print_child;
+static device_probe_t miibus_probe;
 static bus_read_ivar_t miibus_read_ivar;
 static miibus_readreg_t miibus_readreg;
 static miibus_statchg_t miibus_statchg;
@@ -110,7 +113,7 @@ struct miibus_ivars {
 	u_int		mii_offset;
 };
 
-int
+static int
 miibus_probe(device_t dev)
 {
 
@@ -119,7 +122,7 @@ miibus_probe(device_t dev)
 	return (BUS_PROBE_SPECIFIC);
 }
 
-int
+static int
 miibus_attach(device_t dev)
 {
 	struct miibus_ivars	*ivars;
@@ -151,7 +154,7 @@ miibus_attach(device_t dev)
 	return (bus_generic_attach(dev));
 }
 
-int
+static int
 miibus_detach(device_t dev)
 {
 	struct mii_data		*mii;
diff --git a/sys/dev/mii/miivar.h b/sys/dev/mii/miivar.h
index 9af5b4e45082..34b0e9edf92f 100644
--- a/sys/dev/mii/miivar.h
+++ b/sys/dev/mii/miivar.h
@@ -246,10 +246,6 @@ MIIBUS_ACCESSOR(flags,		FLAGS,		u_int)
 extern devclass_t	miibus_devclass;
 extern driver_t		miibus_driver;
 
-int	miibus_probe(device_t);
-int	miibus_attach(device_t);
-int	miibus_detach(device_t);
-
 int	mii_attach(device_t, device_t *, struct ifnet *, ifm_change_cb_t,
 	    ifm_stat_cb_t, int, int, int, int);
 void	mii_down(struct mii_data *);