diff --git a/src/win/core.c b/src/win/core.c
index 78c9fac5..4af238c2 100644
--- a/src/win/core.c
+++ b/src/win/core.c
@@ -100,13 +100,18 @@ static void uv_loop_init(uv_loop_t* loop) {
 
 static void uv_default_loop_init(void) {
   /* Initialize libuv itself first */
-  uv_once(&uv_init_guard_, uv_init);
+  uv__once_init();
 
   /* Initialize the main loop */
   uv_loop_init(&uv_default_loop_);
 }
 
 
+void uv__once_init(void) {
+  uv_once(&uv_init_guard_, uv_init);
+}
+
+
 uv_loop_t* uv_default_loop(void) {
   uv_once(&uv_default_loop_init_guard_, uv_default_loop_init);
   return &uv_default_loop_;
@@ -117,7 +122,7 @@ uv_loop_t* uv_loop_new(void) {
   uv_loop_t* loop;
 
   /* Initialize libuv itself first */
-  uv_once(&uv_init_guard_, uv_init);
+  uv__once_init();
 
   loop = (uv_loop_t*)malloc(sizeof(uv_loop_t));
 
diff --git a/src/win/internal.h b/src/win/internal.h
index 78762261..186b62c3 100644
--- a/src/win/internal.h
+++ b/src/win/internal.h
@@ -299,6 +299,8 @@ void uv_prepare_invoke(uv_loop_t* loop);
 void uv_check_invoke(uv_loop_t* loop);
 void uv_idle_invoke(uv_loop_t* loop);
 
+void uv__once_init();
+
 
 /*
  * Async watcher