diff --git a/Source/OpenTK/Platform/Windows/WinGLNative.cs b/Source/OpenTK/Platform/Windows/WinGLNative.cs
index 18cbd3dd..1d8d7498 100644
--- a/Source/OpenTK/Platform/Windows/WinGLNative.cs
+++ b/Source/OpenTK/Platform/Windows/WinGLNative.cs
@@ -730,7 +730,11 @@ namespace OpenTK.Platform.Windows
             }
             set
             {
-                ClientSize = value.Size;
+                WindowStyle style = (WindowStyle)Functions.GetWindowLong(window.WindowHandle, GetWindowLongOffsets.STYLE);
+                Win32Rectangle rect = Win32Rectangle.From(value);
+                Functions.AdjustWindowRect(ref rect, style, false);
+                Location = new Point(rect.left, rect.top);
+                Size = new Size(rect.Width, rect.Height);
             }
         }
 
diff --git a/Source/OpenTK/Platform/X11/X11GLNative.cs b/Source/OpenTK/Platform/X11/X11GLNative.cs
index c64ea7c6..ce5154a0 100644
--- a/Source/OpenTK/Platform/X11/X11GLNative.cs
+++ b/Source/OpenTK/Platform/X11/X11GLNative.cs
@@ -994,6 +994,8 @@ namespace OpenTK.Platform.X11
             {
                 using (new XLock(window.Display))
                 {
+                    Functions.XMoveWindow(window.Display, window.WindowHandle,
+                        value.X, value.Y);
                     Functions.XResizeWindow(window.Display, window.WindowHandle,
                         value.Width, value.Height);
                 }