diff --git a/sys/dev/acpica/acpi.c b/sys/dev/acpica/acpi.c
index f4e553e0e4e3..9fe6abcbb4df 100644
--- a/sys/dev/acpica/acpi.c
+++ b/sys/dev/acpica/acpi.c
@@ -218,7 +218,7 @@ static struct rman acpi_rman_io, acpi_rman_mem;
 static const char* sleep_state_names[] = {
     "S0", "S1", "S2", "S3", "S4", "S5", "NONE"};
 
-SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RW, NULL, "ACPI debugging");
+SYSCTL_NODE(_debug, OID_AUTO, acpi, CTLFLAG_RD, NULL, "ACPI debugging");
 static char acpi_ca_version[12];
 SYSCTL_STRING(_debug_acpi, OID_AUTO, acpi_ca_version, CTLFLAG_RD,
 	      acpi_ca_version, 0, "Version of Intel ACPI-CA");
@@ -516,14 +516,12 @@ acpi_attach(device_t dev)
 	OID_AUTO, "suspend_state", CTLTYPE_STRING | CTLFLAG_RW,
 	&sc->acpi_suspend_sx, 0, acpi_sleep_state_sysctl, "A", "");
     SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
-	OID_AUTO, "sleep_delay", CTLFLAG_RD | CTLFLAG_RW,
-	&sc->acpi_sleep_delay, 0, "sleep delay");
+	OID_AUTO, "sleep_delay", CTLFLAG_RW, &sc->acpi_sleep_delay, 0,
+	"sleep delay");
     SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
-	OID_AUTO, "s4bios", CTLFLAG_RD | CTLFLAG_RW,
-	&sc->acpi_s4bios, 0, "S4BIOS mode");
+	OID_AUTO, "s4bios", CTLFLAG_RW, &sc->acpi_s4bios, 0, "S4BIOS mode");
     SYSCTL_ADD_INT(&sc->acpi_sysctl_ctx, SYSCTL_CHILDREN(sc->acpi_sysctl_tree),
-	OID_AUTO, "verbose", CTLFLAG_RD | CTLFLAG_RW,
-	&sc->acpi_verbose, 0, "verbose mode");
+	OID_AUTO, "verbose", CTLFLAG_RW, &sc->acpi_verbose, 0, "verbose mode");
 
     /*
      * Default to 1 second before sleeping to give some machines time to
diff --git a/sys/dev/acpica/acpi_battery.c b/sys/dev/acpica/acpi_battery.c
index 65ae95878504..e5c8d07e08aa 100644
--- a/sys/dev/acpica/acpi_battery.c
+++ b/sys/dev/acpica/acpi_battery.c
@@ -482,7 +482,7 @@ acpi_battery_init(void)
 	NULL, 0, acpi_battery_units_sysctl, "I", "number of batteries");
     SYSCTL_ADD_INT(&acpi_battery_sysctl_ctx,
 	SYSCTL_CHILDREN(acpi_battery_sysctl_tree),
-	OID_AUTO, "info_expire", CTLFLAG_RD | CTLFLAG_RW,
+	OID_AUTO, "info_expire", CTLFLAG_RW,
 	&acpi_battery_info_expire, 0,
 	"time in seconds until info is refreshed");
 
diff --git a/sys/dev/acpica/acpi_thermal.c b/sys/dev/acpica/acpi_thermal.c
index d112365d426f..afbe4fb86e85 100644
--- a/sys/dev/acpica/acpi_thermal.c
+++ b/sys/dev/acpica/acpi_thermal.c
@@ -242,12 +242,12 @@ acpi_tz_attach(device_t dev)
 			      OID_AUTO, "thermal", CTLFLAG_RD, 0, "");
 	SYSCTL_ADD_INT(&acpi_tz_sysctl_ctx,
 		       SYSCTL_CHILDREN(acpi_tz_sysctl_tree),
-		       OID_AUTO, "min_runtime", CTLFLAG_RD | CTLFLAG_RW,
+		       OID_AUTO, "min_runtime", CTLFLAG_RW,
 		       &acpi_tz_min_runtime, 0,
 		       "minimum cooling run time in sec");
 	SYSCTL_ADD_INT(&acpi_tz_sysctl_ctx,
 		       SYSCTL_CHILDREN(acpi_tz_sysctl_tree),
-		       OID_AUTO, "polling_rate", CTLFLAG_RD | CTLFLAG_RW,
+		       OID_AUTO, "polling_rate", CTLFLAG_RW,
 		       &acpi_tz_polling_rate, 0, "monitor polling rate");
     }
     sysctl_ctx_init(&sc->tz_sysctl_ctx);