diff --git a/config/gen/opengl.pm b/config/gen/opengl.pm
index c5d8e7081e..3a3a45a84b 100644
--- a/config/gen/opengl.pm
+++ b/config/gen/opengl.pm
@@ -797,9 +797,9 @@ sub gen_opengl_wrappers {
 $autogen_header
 
 # GLUT callbacks
-v    JP
-v    JPi
-v    JPii
+v    pP
+v    pPi
+v    pPii
 
 # Generated signatures
 HEADER
@@ -826,65 +826,65 @@ HEADER
     .local pmc glutcb_funcs
     glutcb_funcs = new 'ResizableStringArray'
     push glutcb_funcs, 'Parrot_glut_nci_loader'
-    push glutcb_funcs, 'vJ'
+    push glutcb_funcs, 'vp'
     push glutcb_funcs, 'glutcbCloseFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbDisplayFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbIdleFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbMenuDestroyFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbOverlayDisplayFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbWMCloseFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbEntryFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbMenuStateFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbVisibilityFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbWindowStatusFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbButtonBoxFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbDialsFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbMotionFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbPassiveMotionFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbReshapeFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbSpaceballButtonFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbTabletMotionFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbKeyboardFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbKeyboardUpFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbMenuStatusFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbSpaceballMotionFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbSpaceballRotateFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbSpecialFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbSpecialUpFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbMouseFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbMouseWheelFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbTabletButtonFunc'
-    push glutcb_funcs, 'vJP'
+    push glutcb_funcs, 'vpP'
     push glutcb_funcs, 'glutcbTimerFunc'
-    push glutcb_funcs, 'vJPii'
+    push glutcb_funcs, 'vpPii'
     push glutcb_funcs, 'glutcbJoystickFunc'
-    push glutcb_funcs, 'vJPi'
+    push glutcb_funcs, 'vpPi'
 
     .return (glutcb_funcs)
 .end
diff --git a/runtime/parrot/library/OpenGL.pir b/runtime/parrot/library/OpenGL.pir
index e1a5f7ba16..e3ecfa04ab 100644
--- a/runtime/parrot/library/OpenGL.pir
+++ b/runtime/parrot/library/OpenGL.pir
@@ -199,14 +199,14 @@ Create NCI wrappers for all GL, GLU, and GLUT functions
     glut_funcs   = _glut_func_list()
     glutcb_funcs = _glutcb_func_list()
 
-    _wrap_nci_list(namespace, libgl,     gl_funcs)
-    _wrap_nci_list(namespace, libglu,    glu_funcs)
-    _wrap_nci_list(namespace, libglut,   glut_funcs)
-    _wrap_nci_list(namespace, libglutcb, glutcb_funcs)
+    _wrap_nci_list(namespace, libgl,     gl_funcs,     0)
+    _wrap_nci_list(namespace, libglu,    glu_funcs,    0)
+    _wrap_nci_list(namespace, libglut,   glut_funcs,   0)
+    _wrap_nci_list(namespace, libglutcb, glutcb_funcs, 1)
 .end
 
 
-=item _wrap_nci_list(pmc namespace, pmc library, pmc nci_list)
+=item _wrap_nci_list(pmc namespace, pmc library, pmc nci_list, int first_arg_interp)
 
 Create NCI wrappers for every C<library> entry point in C<nci_list>,
 and store the results in C<namespace> .  The list should consist of
@@ -218,6 +218,7 @@ alternating function names and Parrot NCI signatures.
     .param pmc namespace
     .param pmc library
     .param pmc nci_list
+    .param int first_arg_interp
 
     .local pmc namespace_key
     namespace_key = namespace.'get_name'()
@@ -232,12 +233,29 @@ alternating function names and Parrot NCI signatures.
     func_name = shift list_iter
     signature = shift list_iter
     function  = dlfunc library, func_name, signature
+    unless first_arg_interp goto done_interp_wrap
+        .const 'Sub' $P0 = '_call_with_interp'
+        $P0 = clone $P0
+        $P0(function)
+        function = $P0
+    done_interp_wrap:
     set_root_global namespace_key, func_name, function
     goto list_loop
 
   done:
 .end
 
+.sub _call_with_interp :anon
+    .param pmc func
+    $P0 = getinterp
+    .yield ()
+  call:
+    .param pmc args :slurpy
+    func($P0, args :flat)
+    .yield ()
+    goto call
+.end
+
 
 =back