diff --git a/native/Avalonia.Native/src/OSX/WindowBaseImpl.mm b/native/Avalonia.Native/src/OSX/WindowBaseImpl.mm
index f133fa34f6..45d78b3926 100644
--- a/native/Avalonia.Native/src/OSX/WindowBaseImpl.mm
+++ b/native/Avalonia.Native/src/OSX/WindowBaseImpl.mm
@@ -224,7 +224,7 @@ HRESULT WindowBaseImpl::GetFrameSize(AvnSize *ret) {
         if (ret == nullptr)
             return E_POINTER;
 
-        if(Window != nullptr){
+        if(Window != nullptr && _shown){
             auto frame = [Window frame];
             ret->Width = frame.size.width;
             ret->Height = frame.size.height;