diff --git a/include/asm-powerpc/time.h b/include/asm-powerpc/time.h
index 4cff977..3fd57c0 100644
--- a/include/asm-powerpc/time.h
+++ b/include/asm-powerpc/time.h
@@ -39,6 +39,8 @@
 extern void wakeup_decrementer(void);
 extern void snapshot_timebase(void);
 
+extern void set_dec_cpu6(unsigned int val);
+
 /* Some sane defaults: 125 MHz timebase, 1GHz processor */
 extern unsigned long ppc_proc_freq;
 #define DEFAULT_PROC_FREQ	(DEFAULT_TB_FREQ * 8)