diff --git a/sys/dev/cpufreq/ichss.c b/sys/dev/cpufreq/ichss.c
index 179886e0e162..fc7f0acd3d1e 100644
--- a/sys/dev/cpufreq/ichss.c
+++ b/sys/dev/cpufreq/ichss.c
@@ -181,7 +181,7 @@ ichss_identify(driver_t *driver, device_t parent)
 	}
 	DPRINT("ichss: PMBASE is %#x\n", pmbase);
 
-	child = BUS_ADD_CHILD(parent, 0, "ichss", 0);
+	child = BUS_ADD_CHILD(parent, 20, "ichss", 0);
 	if (child == NULL) {
 		device_printf(parent, "add SpeedStep child failed\n");
 		return;
diff --git a/sys/i386/cpufreq/est.c b/sys/i386/cpufreq/est.c
index ac99e040257b..8732cbd68e16 100644
--- a/sys/i386/cpufreq/est.c
+++ b/sys/i386/cpufreq/est.c
@@ -967,7 +967,7 @@ est_identify(driver_t *driver, device_t parent)
 	 * We add a child for each CPU since settings must be performed
 	 * on each CPU in the SMP case.
 	 */
-	child = BUS_ADD_CHILD(parent, 0, "est", -1);
+	child = BUS_ADD_CHILD(parent, 10, "est", -1);
 	if (child == NULL)
 		device_printf(parent, "add est child failed\n");
 }
diff --git a/sys/i386/cpufreq/p4tcc.c b/sys/i386/cpufreq/p4tcc.c
index 4dc206a9e075..10236ec32daf 100644
--- a/sys/i386/cpufreq/p4tcc.c
+++ b/sys/i386/cpufreq/p4tcc.c
@@ -131,7 +131,7 @@ p4tcc_identify(driver_t *driver, device_t parent)
 	 * of the IA32 Intel Architecture Software Developer's Manual,
 	 * Volume 3, for more info.
 	 */
-	if (BUS_ADD_CHILD(parent, 0, "p4tcc", -1) == NULL)
+	if (BUS_ADD_CHILD(parent, 10, "p4tcc", -1) == NULL)
 		device_printf(parent, "add p4tcc child failed\n");
 }
 
diff --git a/sys/i386/cpufreq/powernow.c b/sys/i386/cpufreq/powernow.c
index b9b6310f0af2..34b40cc4a84a 100644
--- a/sys/i386/cpufreq/powernow.c
+++ b/sys/i386/cpufreq/powernow.c
@@ -894,7 +894,7 @@ pn_identify(driver_t *driver, device_t parent)
 	}
 	if (device_find_child(parent, "powernow", -1) != NULL)
 		return;
-	if ((child = BUS_ADD_CHILD(parent, 0, "powernow", -1)) == NULL)
+	if ((child = BUS_ADD_CHILD(parent, 10, "powernow", -1)) == NULL)
 		device_printf(parent, "powernow: add child failed\n");
 }
 
diff --git a/sys/i386/cpufreq/smist.c b/sys/i386/cpufreq/smist.c
index 2e41ed7d3444..d174427dc322 100644
--- a/sys/i386/cpufreq/smist.c
+++ b/sys/i386/cpufreq/smist.c
@@ -308,7 +308,7 @@ smist_identify(driver_t *driver, device_t parent)
 
 	if (device_find_child(parent, "smist", -1) != NULL)
 		return;
-	if (BUS_ADD_CHILD(parent, 0, "smist", -1) == NULL)
+	if (BUS_ADD_CHILD(parent, 30, "smist", -1) == NULL)
 		device_printf(parent, "smist: add child failed\n");
 }