diff --git a/Source/OpenTK/Platform/X11/X11KeyMap.cs b/Source/OpenTK/Platform/X11/X11KeyMap.cs
index 51713d18..9fba864c 100644
--- a/Source/OpenTK/Platform/X11/X11KeyMap.cs
+++ b/Source/OpenTK/Platform/X11/X11KeyMap.cs
@@ -132,8 +132,6 @@ namespace OpenTK.Platform.X11
             catch (ArgumentException e)
             {
                 Debug.Print("Exception while creating keymap: '{0}'.", e.ToString());
-                System.Windows.Forms.MessageBox.Show(
-                    String.Format("Exception while creating keymap: '{0}'.", e.ToString()));
             }
         }
     }