diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index f8f86231ad90..3f9d9acc69e6 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -1533,9 +1533,6 @@ extern int event_trigger_init(struct event_trigger_ops *ops,
 extern int trace_event_trigger_enable_disable(struct trace_event_file *file,
 					      int trigger_enable);
 extern void update_cond_flag(struct trace_event_file *file);
-extern void unregister_trigger(char *glob, struct event_trigger_ops *ops,
-			       struct event_trigger_data *test,
-			       struct trace_event_file *file);
 extern int set_trigger_filter(char *filter_str,
 			      struct event_trigger_data *trigger_data,
 			      struct trace_event_file *file);
diff --git a/kernel/trace/trace_events_trigger.c b/kernel/trace/trace_events_trigger.c
index 5dea177cef53..58d21fd52932 100644
--- a/kernel/trace/trace_events_trigger.c
+++ b/kernel/trace/trace_events_trigger.c
@@ -579,9 +579,9 @@ out:
  * Usually used directly as the @unreg method in event command
  * implementations.
  */
-void unregister_trigger(char *glob, struct event_trigger_ops *ops,
-			struct event_trigger_data *test,
-			struct trace_event_file *file)
+static void unregister_trigger(char *glob, struct event_trigger_ops *ops,
+			       struct event_trigger_data *test,
+			       struct trace_event_file *file)
 {
 	struct event_trigger_data *data;
 	bool unregistered = false;