diff --git a/auto/core/GL_VERSION_3_1 b/auto/core/GL_VERSION_3_1
index ec8eea2..3e387a3 100644
--- a/auto/core/GL_VERSION_3_1
+++ b/auto/core/GL_VERSION_3_1
@@ -17,8 +17,6 @@ http://www.opengl.org/registry/doc/glspec30.20080811.pdf
 	GL_TEXTURE_BINDING_RECTANGLE 0x84F6
 	GL_PROXY_TEXTURE_RECTANGLE 0x84F7
 	GL_MAX_RECTANGLE_TEXTURE_SIZE 0x84F8
-	GL_COPY_READ_BUFFER 0x8F36
-	GL_COPY_WRITE_BUFFER 0x8F37
 	GL_RED_SNORM 0x8F90
 	GL_RG_SNORM 0x8F91
 	GL_RGB_SNORM 0x8F92