diff --git a/include/acpi/video.h b/include/acpi/video.h
index a7d7f10..e840b29 100644
--- a/include/acpi/video.h
+++ b/include/acpi/video.h
@@ -43,7 +43,7 @@
 {
 	return acpi_backlight_vendor;
 }
-static void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type)
+static inline void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type)
 {
 }
 #endif