diff --git a/Source/OpenTK/Graphics/ES11/Helper.cs b/Source/OpenTK/Graphics/ES11/Helper.cs
index a08d8263..98d2f9d0 100644
--- a/Source/OpenTK/Graphics/ES11/Helper.cs
+++ b/Source/OpenTK/Graphics/ES11/Helper.cs
@@ -26,9 +26,9 @@ namespace OpenTK.Graphics.ES11
         /// </summary>
         public GL()
         {
-            EntryPointsInstance = EntryPoints;
-            EntryPointNamesInstance = EntryPointNames;
-            EntryPointNameOffsetsInstance = EntryPointNameOffsets;
+            _EntryPointsInstance = EntryPoints;
+            _EntryPointNamesInstance = EntryPointNames;
+            _EntryPointNameOffsetsInstance = EntryPointNameOffsets;
         }
 
         #endregion
diff --git a/Source/OpenTK/Graphics/ES20/Helper.cs b/Source/OpenTK/Graphics/ES20/Helper.cs
index 60c6fcb4..1307d55d 100644
--- a/Source/OpenTK/Graphics/ES20/Helper.cs
+++ b/Source/OpenTK/Graphics/ES20/Helper.cs
@@ -54,9 +54,9 @@ namespace OpenTK.Graphics.ES20
         /// </summary>
         public GL()
         {
-            EntryPointsInstance = EntryPoints;
-            EntryPointNamesInstance = EntryPointNames;
-            EntryPointNameOffsetsInstance = EntryPointNameOffsets;
+            _EntryPointsInstance = EntryPoints;
+            _EntryPointNamesInstance = EntryPointNames;
+            _EntryPointNameOffsetsInstance = EntryPointNameOffsets;
         }
 
         #endregion
diff --git a/Source/OpenTK/Graphics/ES30/Helper.cs b/Source/OpenTK/Graphics/ES30/Helper.cs
index 222d3091..7fda7c64 100644
--- a/Source/OpenTK/Graphics/ES30/Helper.cs
+++ b/Source/OpenTK/Graphics/ES30/Helper.cs
@@ -54,9 +54,9 @@ namespace OpenTK.Graphics.ES30
         /// </summary>
         public GL()
         {
-            EntryPointsInstance = EntryPoints;
-            EntryPointNamesInstance = EntryPointNames;
-            EntryPointNameOffsetsInstance = EntryPointNameOffsets;
+            _EntryPointsInstance = EntryPoints;
+            _EntryPointNamesInstance = EntryPointNames;
+            _EntryPointNameOffsetsInstance = EntryPointNameOffsets;
         }
 
         #endregion
diff --git a/Source/OpenTK/Graphics/GraphicsBindingsBase.cs b/Source/OpenTK/Graphics/GraphicsBindingsBase.cs
index 96e94796..0b3dc28d 100644
--- a/Source/OpenTK/Graphics/GraphicsBindingsBase.cs
+++ b/Source/OpenTK/Graphics/GraphicsBindingsBase.cs
@@ -39,15 +39,21 @@ namespace OpenTK.Graphics
         /// Contains the list of API entry points (function pointers).
         /// This field must be set by an inheriting class.
         /// </summary>
+        [Obsolete("Not used - this field remains for 1.1 API compatibility")]
         protected IntPtr[] EntryPointsInstance;
 
         /// <summary>
+        /// with the 1.1 API.
         /// Contains the list of API entry point names.
         /// This field must be set by an inheriting class.
         /// </summary>
-        protected byte[] EntryPointNamesInstance;
+        [Obsolete("Not used - this field remains for 1.1 API compatibility")]
+        protected string[] EntryPointNamesInstance;
 
-        protected int[] EntryPointNameOffsetsInstance;
+
+        internal protected IntPtr[] _EntryPointsInstance;
+        internal protected byte[] _EntryPointNamesInstance;
+        internal protected int[] _EntryPointNameOffsetsInstance;
 
         /// <summary>
         /// Retrieves an unmanaged function pointer to the specified function.
@@ -85,12 +91,12 @@ namespace OpenTK.Graphics
             IGraphicsContextInternal context_internal = context as IGraphicsContextInternal;
             unsafe
             {
-                fixed (byte* name = EntryPointNamesInstance)
+                fixed (byte* name = _EntryPointNamesInstance)
                 {
-                    for (int i = 0; i < EntryPointsInstance.Length; i++)
+                    for (int i = 0; i < _EntryPointsInstance.Length; i++)
                     {
-                        EntryPointsInstance[i] = context_internal.GetAddress(
-                            new IntPtr(name + EntryPointNameOffsetsInstance[i]));
+                        _EntryPointsInstance[i] = context_internal.GetAddress(
+                            new IntPtr(name + _EntryPointNameOffsetsInstance[i]));
                     }
                 }
             }
diff --git a/Source/OpenTK/Graphics/OpenGL/GLHelper.cs b/Source/OpenTK/Graphics/OpenGL/GLHelper.cs
index f0148d63..808d3829 100644
--- a/Source/OpenTK/Graphics/OpenGL/GLHelper.cs
+++ b/Source/OpenTK/Graphics/OpenGL/GLHelper.cs
@@ -91,9 +91,9 @@ namespace OpenTK.Graphics.OpenGL
         /// </summary>
         public GL()
         {
-            EntryPointsInstance = EntryPoints;
-            EntryPointNamesInstance = EntryPointNames;
-            EntryPointNameOffsetsInstance = EntryPointNameOffsets;
+            _EntryPointsInstance = EntryPoints;
+            _EntryPointNamesInstance = EntryPointNames;
+            _EntryPointNameOffsetsInstance = EntryPointNameOffsets;
         }
 
         #endregion
diff --git a/Source/OpenTK/Graphics/OpenGL4/Helper.cs b/Source/OpenTK/Graphics/OpenGL4/Helper.cs
index 9dadde77..d8da0b54 100644
--- a/Source/OpenTK/Graphics/OpenGL4/Helper.cs
+++ b/Source/OpenTK/Graphics/OpenGL4/Helper.cs
@@ -54,9 +54,9 @@ namespace OpenTK.Graphics.OpenGL4
         /// </summary>
         public GL()
         {
-            EntryPointsInstance = EntryPoints;
-            EntryPointNamesInstance = EntryPointNames;
-            EntryPointNameOffsetsInstance = EntryPointNameOffsets;
+            _EntryPointsInstance = EntryPoints;
+            _EntryPointNamesInstance = EntryPointNames;
+            _EntryPointNameOffsetsInstance = EntryPointNameOffsets;
         }
 
         #endregion