diff --git a/win32_os.c b/win32_os.c
index 485db68..98c0f94 100644
--- a/win32_os.c
+++ b/win32_os.c
@@ -372,6 +372,11 @@ fn HumanTime osHumanTimeFromMicroseconds(u64 micros) {
   return result;
 }
 
+fn void osBarrierWait(Barrier barrier) {
+  assert(false && "Not Implemented yet");
+	return;
+}
+
 // poll() shim using select() on windows
 int poll(struct pollfd *fds, nfds_t nfds, int timeout) {
   assert(nfds <= FD_SETSIZE);