diff --git a/src/opengl.nim b/src/opengl.nim
index 364e47f..cd8a24c 100644
--- a/src/opengl.nim
+++ b/src/opengl.nim
@@ -3164,7 +3164,7 @@ wrapErrorChecking:
 {.pop.} # stdcall, hint[XDeclaredButNotUsed]: off.
 
 const
-  cGL_UNSIGNED_BYTE = 0x1401
+  cGL_UNSIGNED_BYTE* = 0x1401
   GL_2X_BIT_ATI* = 0x00000001
   GL_MODELVIEW6_ARB* = 0x8726
   GL_CULL_FACE_MODE* = 0x0B45