diff --git a/src/win/core.c b/src/win/core.c
index 1983361b..1358cb29 100644
--- a/src/win/core.c
+++ b/src/win/core.c
@@ -91,6 +91,8 @@ static void uv_loop_init(uv_loop_t* loop) {
   loop->active_udp_streams = 0;
 
   loop->last_err = uv_ok_;
+
+  memset(&loop->counters, 0, sizeof loop->counters);
 }