diff --git a/src/unix/bsd-proctitle.c b/src/unix/bsd-proctitle.c
index 4f4e9e518..b0c01e2cb 100644
--- a/src/unix/bsd-proctitle.c
+++ b/src/unix/bsd-proctitle.c
@@ -38,6 +38,7 @@ static void init_process_title_mutex_once(void) {
 
 
 void uv__process_title_cleanup(void) {
+  uv_once(&process_title_mutex_once, init_process_title_mutex_once);
   uv_mutex_destroy(&process_title_mutex);
 }