diff --git a/Source/Bind/Specifications/csharp.tm b/Source/Bind/Specifications/csharp.tm
index 97fa316d..e3a2fcc1 100644
--- a/Source/Bind/Specifications/csharp.tm
+++ b/Source/Bind/Specifications/csharp.tm
@@ -63,6 +63,9 @@ VoidPointer,    void*
 float,          float
 int,            int
 #void,           *
+GLDEBUGPROCARB, DebugProcArb
+GLDEBUGPROCAMD , DebugProcAmd
+GLvdpauSurfaceNV, IntPtr
 
 # Glu types.
 Float64         double
@@ -99,6 +102,8 @@ GLeglImageOES, IntPtr
 
 
 # OpenCL types.
+_cl_context, IntPtr
+_cl_event, IntPtr
 cl_command_queue, IntPtr
 cl_context, IntPtr
 cl_device_id, IntPtr