diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
index 6a34717c9f31..5d0179758738 100644
--- a/tools/perf/util/dso.c
+++ b/tools/perf/util/dso.c
@@ -1779,7 +1779,7 @@ void dso__read_running_kernel_build_id(struct dso *dso, struct machine *machine)
 
 	if (machine__is_default_guest(machine))
 		return;
-	sprintf(path, "%s/sys/kernel/notes", machine->root_dir);
+	snprintf(path, sizeof(path), "%s/sys/kernel/notes", machine->root_dir);
 	sysfs__read_build_id(path, &bid);
 	dso__set_build_id(dso, &bid);
 }