diff --git a/include/linux/nmi.h b/include/linux/nmi.h
index aa3cd0878270..5e2e57536d98 100644
--- a/include/linux/nmi.h
+++ b/include/linux/nmi.h
@@ -12,9 +12,6 @@ extern void touch_softlockup_watchdog_sched(void);
 extern void touch_softlockup_watchdog(void);
 extern void touch_softlockup_watchdog_sync(void);
 extern void touch_all_softlockup_watchdogs(void);
-extern int proc_dowatchdog_thresh(struct ctl_table *table, int write,
-				  void __user *buffer,
-				  size_t *lenp, loff_t *ppos);
 extern unsigned int  softlockup_panic;
 extern unsigned int  hardlockup_panic;
 void lockup_detector_init(void);