diff --git a/Source/Bind/ES/ESGenerator.cs b/Source/Bind/ES/ESGenerator.cs
index 9ffb46cd..783e85e7 100644
--- a/Source/Bind/ES/ESGenerator.cs
+++ b/Source/Bind/ES/ESGenerator.cs
@@ -35,7 +35,6 @@ namespace Bind.ES
             Settings.DelegatesClass = "Delegates";
 
             Settings.OutputClass = "GL";
-            Settings.OutputNamespace = "OpenTK.Graphics." + nsName;
         }
     }
 }
diff --git a/Source/Bind/Main.cs b/Source/Bind/Main.cs
index 810ccb51..d1c8dc4b 100644
--- a/Source/Bind/Main.cs
+++ b/Source/Bind/Main.cs
@@ -223,6 +223,7 @@ namespace Bind
                 Settings.DefaultOutputPath = Path.Combine(
                     Directory.GetParent(Settings.DefaultOutputPath).ToString(),
                     dirName);
+                Settings.DefaultOutputNamespace = "OpenTK.Graphics.ES10";
             }
             else if (arg == "es11")
             {
@@ -230,6 +231,7 @@ namespace Bind
                 Settings.DefaultOutputPath = Path.Combine(
                     Directory.GetParent(Settings.DefaultOutputPath).ToString(),
                     dirName);
+                Settings.DefaultOutputNamespace = "OpenTK.Graphics.ES11";
             }
             else if (arg == "es20")
             {
@@ -237,6 +239,7 @@ namespace Bind
                 Settings.DefaultOutputPath = Path.Combine(
                     Directory.GetParent(Settings.DefaultOutputPath).ToString(),
                     dirName);
+                Settings.DefaultOutputNamespace = "OpenTK.Graphics.ES20";
             }
             else if (arg == "cl" || arg == "cl10")
             {