diff --git a/Source/OpenTK/GameWindowFlags.cs b/Source/OpenTK/GameWindowFlags.cs
index 91bfca18..dfb6fbda 100644
--- a/Source/OpenTK/GameWindowFlags.cs
+++ b/Source/OpenTK/GameWindowFlags.cs
@@ -44,5 +44,10 @@ namespace OpenTK
         /// Indicates that the GameWindow should cover the whole screen.
         /// </summary>
         Fullscreen = 1,
+
+        /// <summary>
+        /// Indicates that the GameWindow should be a fixed window.
+        /// </summary>
+        FixedWindow = 2,
     }
 }
\ No newline at end of file
diff --git a/Source/OpenTK/NativeWindow.cs b/Source/OpenTK/NativeWindow.cs
index 96812c98..9b731f53 100644
--- a/Source/OpenTK/NativeWindow.cs
+++ b/Source/OpenTK/NativeWindow.cs
@@ -112,6 +112,11 @@ namespace OpenTK
                 }
                 WindowState = WindowState.Fullscreen;
             }
+
+            if ((options & GameWindowFlags.FixedWindow) != 0)
+            {
+                WindowBorder = WindowBorder.Fixed;
+            }
         }
 
         #endregion
diff --git a/Source/OpenTK/Platform/SDL2/Sdl2NativeWindow.cs b/Source/OpenTK/Platform/SDL2/Sdl2NativeWindow.cs
index 036fb5c7..0e576e90 100644
--- a/Source/OpenTK/Platform/SDL2/Sdl2NativeWindow.cs
+++ b/Source/OpenTK/Platform/SDL2/Sdl2NativeWindow.cs
@@ -77,7 +77,6 @@ namespace OpenTK.Platform.SDL2
                 var bounds = device.Bounds;
                 var flags = TranslateFlags(options);
                 flags |= WindowFlags.OPENGL;
-                flags |= WindowFlags.RESIZABLE;
                 flags |= WindowFlags.HIDDEN;
                 if (Toolkit.Options.EnableHighResolution)
                 {
@@ -88,6 +87,9 @@ namespace OpenTK.Platform.SDL2
                     (flags & WindowFlags.FULLSCREEN) != 0)
                     window_state = WindowState.Fullscreen;
 
+                if ((flags & WindowFlags.RESIZABLE) == 0)
+                    window_border = WindowBorder.Fixed;
+
                 IntPtr handle;
                 lock (SDL.Sync)
                 {
@@ -106,17 +108,20 @@ namespace OpenTK.Platform.SDL2
 
         static WindowFlags TranslateFlags(GameWindowFlags flags)
         {
-            switch (flags)
-            {
-                case GameWindowFlags.Fullscreen:
-                    if (Sdl2Factory.UseFullscreenDesktop)
-                        return WindowFlags.FULLSCREEN_DESKTOP;
-                    else
-                        return WindowFlags.FULLSCREEN;
+            WindowFlags windowFlags = WindowFlags.Default;
 
-                default:
-                    return WindowFlags.Default;
+            if ((flags & GameWindowFlags.Fullscreen) != 0)
+            {
+                if (Sdl2Factory.UseFullscreenDesktop)
+                    windowFlags |= WindowFlags.FULLSCREEN_DESKTOP;
+                else
+                    windowFlags |= WindowFlags.FULLSCREEN;
             }
+
+            if ((flags & GameWindowFlags.FixedWindow) == 0)
+                windowFlags |= WindowFlags.RESIZABLE;
+
+            return windowFlags;
         }
 
         static Key TranslateKey(Scancode scan)