diff --git a/sys/compat/linuxkpi/common/include/linux/dmi.h b/sys/compat/linuxkpi/common/include/linux/dmi.h
--- a/sys/compat/linuxkpi/common/include/linux/dmi.h
+++ b/sys/compat/linuxkpi/common/include/linux/dmi.h
@@ -34,6 +34,12 @@
 #include <sys/types.h>
 #include <linux/mod_devicetable.h>
 
+struct dmi_header {
+	uint8_t		type;
+	uint8_t		length;
+	uint16_t	handle;
+};
+
 int linux_dmi_check_system(const struct dmi_system_id *);
 bool linux_dmi_match(enum dmi_field, const char *);
 const struct dmi_system_id *linux_dmi_first_match(const struct dmi_system_id *);
@@ -44,4 +50,11 @@
 #define	dmi_first_match(sysid)	linux_dmi_first_match(sysid)
 #define	dmi_get_system_info(sysid)	linux_dmi_get_system_info(sysid)
 
+static inline int
+dmi_walk(void (*callbackf)(const struct dmi_header *, void *), void *arg)
+{
+
+	return (-ENXIO);
+}
+
 #endif	/* __LINUXKPI_LINUX_DMI_H__ */