diff --git a/src/unix/internal.h b/src/unix/internal.h
index 4b86dcd4..2f4d526a 100644
--- a/src/unix/internal.h
+++ b/src/unix/internal.h
@@ -47,7 +47,7 @@
 #endif
 
 #define STATIC_ASSERT(expr)                                                   \
-  void uv__static_assert(int static_assert_failed[0 - !(expr)])
+  void uv__static_assert(int static_assert_failed[1 - 2 * !(expr)])
 
 #define ACCESS_ONCE(type, var)                                                \
   (*(volatile type*) &(var))
diff --git a/src/win/core.c b/src/win/core.c
index a8699e19..fdba7cb3 100644
--- a/src/win/core.c
+++ b/src/win/core.c
@@ -205,9 +205,7 @@ static void uv_poll(uv_loop_t* loop, int block) {
   if (overlapped) {
     /* Package was dequeued */
     req = uv_overlapped_to_req(overlapped);
-
     uv_insert_pending_req(loop, req);
-
   } else if (GetLastError() != WAIT_TIMEOUT) {
     /* Serious error */
     uv_fatal_error(GetLastError(), "GetQueuedCompletionStatus");
@@ -229,14 +227,13 @@ static void uv_poll_ex(uv_loop_t* loop, int block) {
     timeout = 0;
   }
 
-  assert(pGetQueuedCompletionStatusEx);
-
   success = pGetQueuedCompletionStatusEx(loop->iocp,
                                          overlappeds,
                                          ARRAY_SIZE(overlappeds),
                                          &count,
                                          timeout,
                                          FALSE);
+
   if (success) {
     for (i = 0; i < count; i++) {
       /* Package was dequeued */
diff --git a/src/win/timer.c b/src/win/timer.c
index 0c055da9..7fd10571 100644
--- a/src/win/timer.c
+++ b/src/win/timer.c
@@ -87,6 +87,17 @@ void uv_timer_endgame(uv_loop_t* loop, uv_timer_t* handle) {
 }
 
 
+static uint64_t get_clamped_due_time(uint64_t loop_time, uint64_t timeout) {
+  uint64_t clamped_timeout;
+
+  clamped_timeout = loop_time + timeout;
+  if (clamped_timeout < timeout)
+    clamped_timeout = (uint64_t) -1;
+
+  return clamped_timeout;
+}
+
+
 int uv_timer_start(uv_timer_t* handle, uv_timer_cb timer_cb, uint64_t timeout,
     uint64_t repeat) {
   uv_loop_t* loop = handle->loop;
@@ -97,7 +108,7 @@ int uv_timer_start(uv_timer_t* handle, uv_timer_cb timer_cb, uint64_t timeout,
   }
 
   handle->timer_cb = timer_cb;
-  handle->due = loop->time + timeout;
+  handle->due = get_clamped_due_time(loop->time, timeout);
   handle->repeat = repeat;
   handle->flags |= UV_HANDLE_ACTIVE;
   uv__handle_start(handle);
@@ -143,7 +154,7 @@ int uv_timer_again(uv_timer_t* handle) {
   }
 
   if (handle->repeat) {
-    handle->due = loop->time + handle->repeat;
+    handle->due = get_clamped_due_time(loop->time, handle->repeat);
 
     if (RB_INSERT(uv_timer_tree_s, &loop->timers, handle) != NULL) {
       uv_fatal_error(ERROR_INVALID_DATA, "RB_INSERT");
@@ -212,7 +223,7 @@ void uv_process_timers(uv_loop_t* loop) {
 
     if (timer->repeat != 0) {
       /* If it is a repeating timer, reschedule with repeat timeout. */
-      timer->due += timer->repeat;
+      timer->due = get_clamped_due_time(timer->due, timer->repeat);
       if (timer->due < loop->time) {
         timer->due = loop->time;
       }