diff --git a/native/Avalonia.Native/src/OSX/window.mm b/native/Avalonia.Native/src/OSX/window.mm
index 4d63c486c4..b46655c7df 100644
--- a/native/Avalonia.Native/src/OSX/window.mm
+++ b/native/Avalonia.Native/src/OSX/window.mm
@@ -2231,9 +2231,12 @@ protected:
     {
         @autoreleasepool
         {
-            [Window setContentSize:NSSize{x, y}];
+            if (Window != nullptr)
+            {
+                [Window setContentSize:NSSize{x, y}];
             
-            [Window setFrameTopLeftPoint:ToNSPoint(ConvertPointY(lastPositionSet))];
+                [Window setFrameTopLeftPoint:ToNSPoint(ConvertPointY(lastPositionSet))];
+            }
             
             return S_OK;
         }