diff --git a/SleepyHeadQT.pro b/SleepyHeadQT.pro
index 9d700738..f4c2c88e 100644
--- a/SleepyHeadQT.pro
+++ b/SleepyHeadQT.pro
@@ -103,7 +103,7 @@ macx {
 win32 {
   SOURCES          += qextserialport/win_qextserialport.cpp qextserialport/qextserialenumerator_win.cpp
   DEFINES          += WINVER=0x0501 # needed for mingw to pull in appropriate dbt business...probably a better way to do this
-  LIBS             += -lsetupapi
+  LIBS             += -lsetupapi -lz
 
 
 }
diff --git a/qextserialport/qextserialenumerator_win.cpp b/qextserialport/qextserialenumerator_win.cpp
index 6026b545..f001e70b 100644
--- a/qextserialport/qextserialenumerator_win.cpp
+++ b/qextserialport/qextserialenumerator_win.cpp
@@ -124,7 +124,7 @@ void QextSerialEnumerator::setUpNotifications( )
     dbh.dbcc_size = sizeof(dbh);
     dbh.dbcc_devicetype = DBT_DEVTYP_DEVICEINTERFACE;
     CopyMemory(&dbh.dbcc_classguid, &GUID_DEVCLASS_PORTS, sizeof(GUID));
-    if( RegisterDeviceNotification( notificationWidget->winId( ), &dbh, DEVICE_NOTIFY_WINDOW_HANDLE ) == NULL)
+    if( RegisterDeviceNotification( (HANDLE)notificationWidget->winId( ), &dbh, DEVICE_NOTIFY_WINDOW_HANDLE ) == NULL)
         qWarning() << "RegisterDeviceNotification failed:" << GetLastError();
     // setting up notifications doesn't tell us about devices already connected
     // so get those manually