diff --git a/include/asm-mips/mips_mt.h b/include/asm-mips/mips_mt.h
index c31a312..fdfff0b 100644
--- a/include/asm-mips/mips_mt.h
+++ b/include/asm-mips/mips_mt.h
@@ -12,4 +12,7 @@
 extern void mips_mt_regdump(unsigned long previous_mvpcontrol_value);
 extern void mips_mt_set_cpuoptions(void);
 
+struct class;
+extern struct class *mt_class;
+
 #endif /* __ASM_MIPS_MT_H */