diff --git a/simple_uart.c b/simple_uart.c
index 09c9188..5c5956b 100644
--- a/simple_uart.c
+++ b/simple_uart.c
@@ -942,7 +942,8 @@ int simple_uart_flush(struct simple_uart *uart)
     if (tcdrain(uart->fd) < 0)
         return -errno;
 #else
-    if (!FlushFileBuffers(uart->port))
+    DWORD purge_all = PURGE_RXABORT | PURGE_RXCLEAR | PURGE_TXABORT | PURGE_TXCLEAR;
+    if(!PurgeComm(uart->port, purge_all))
         return win32_errno();
 #endif
     return 0;