diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 7950c65c43af363cd6f5e9fdbdf93a0bb5aff108..9260408bf4eaa7d23df4b15922791f01f5565127 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -217,10 +217,8 @@ static inline int acpi_video_display_switch_support(void)
 #endif /* defined(CONFIG_ACPI_VIDEO) || defined(CONFIG_ACPI_VIDEO_MODULE) */
 
 extern int acpi_blacklisted(void);
-#ifdef CONFIG_DMI
 extern void acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d);
 extern int acpi_osi_setup(char *str);
-#endif
 
 #ifdef CONFIG_ACPI_NUMA
 int acpi_get_pxm(acpi_handle handle);