diff --git a/sysutils/acerhdf-kmod/files/patch-acerhdf.c b/sysutils/acerhdf-kmod/files/patch-acerhdf.c
new file mode 100644
--- /dev/null
+++ b/sysutils/acerhdf-kmod/files/patch-acerhdf.c
@@ -0,0 +1,23 @@
+--- acerhdf.c.orig	2022-05-17 23:02:21 UTC
++++ acerhdf.c
+@@ -246,8 +246,6 @@ struct acerhdf_softc {
+     struct sysctl_oid *sysctl_tree;
+ };
+ 
+-static devclass_t acerhdf_devclass;
+-
+ ACPI_SERIAL_DECL(acerhdf, "Acer Aspire One fan control");
+ 
+ static const struct bios_settings *bios_cfg = NULL;
+@@ -740,5 +738,11 @@ static driver_t acerhdf_driver = {
+     sizeof(struct acerhdf_softc),
+ };
+ 
++#if __FreeBSD_version >= 1400058
++DRIVER_MODULE(acerhdf, acpi, acerhdf_driver, 0, 0);
++#else
++static devclass_t acerhdf_devclass;
++
+ DRIVER_MODULE(acerhdf, acpi, acerhdf_driver, acerhdf_devclass, 0, 0);
++#endif
+ MODULE_DEPEND(acerhdf, acpi, 1, 1, 1);