diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index b6e7d0d56622..956c9b19d81c 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -2441,7 +2441,8 @@ bool ui__has_annotation(void)
 }
 
 
-double annotation_line__max_percent(struct annotation_line *al, struct annotation *notes)
+static double annotation_line__max_percent(struct annotation_line *al,
+					   struct annotation *notes)
 {
 	double percent_max = 0.0;
 	int i;
diff --git a/tools/perf/util/annotate.h b/tools/perf/util/annotate.h
index 5f24fc9dcc7c..a93502d0c582 100644
--- a/tools/perf/util/annotate.h
+++ b/tools/perf/util/annotate.h
@@ -169,7 +169,6 @@ struct annotation_write_ops {
 	void (*write_graph)(void *obj, int graph);
 };
 
-double annotation_line__max_percent(struct annotation_line *al, struct annotation *notes);
 void annotation_line__write(struct annotation_line *al, struct annotation *notes,
 			    struct annotation_write_ops *ops);