diff --git a/Source/OpenTK/Platform/Windows/API.cs b/Source/OpenTK/Platform/Windows/API.cs
index 90731a70..4284ccff 100644
--- a/Source/OpenTK/Platform/Windows/API.cs
+++ b/Source/OpenTK/Platform/Windows/API.cs
@@ -643,7 +643,7 @@ namespace OpenTK.Platform.Windows
 
         [DllImport("user32.dll", SetLastError = true)]
         public static extern LONG ChangeDisplaySettingsEx(LPCTSTR lpszDeviceName, LPDEVMODE lpDevMode,
-            HWND hwnd, DWORD dwflags, LPVOID lParam);
+            HWND hwnd, ChangeDisplaySettingsEnum dwflags, LPVOID lParam);
 
         #endregion
 
diff --git a/Source/OpenTK/Platform/Windows/WinDisplayDevice.cs b/Source/OpenTK/Platform/Windows/WinDisplayDevice.cs
index 1244e628..407c40f8 100644
--- a/Source/OpenTK/Platform/Windows/WinDisplayDevice.cs
+++ b/Source/OpenTK/Platform/Windows/WinDisplayDevice.cs
@@ -111,7 +111,8 @@ namespace OpenTK.Platform.Windows
             }
 
             return Constants.DISP_CHANGE_SUCCESSFUL == 
-                Functions.ChangeDisplaySettingsEx(available_device_names[device], mode, IntPtr.Zero, 0, IntPtr.Zero);
+                Functions.ChangeDisplaySettingsEx(available_device_names[device], mode, IntPtr.Zero,
+                    ChangeDisplaySettingsEnum.Fullscreen, IntPtr.Zero);
         }
 
         #endregion