diff --git a/docs/_extra/specs/enums.txt b/docs/_extra/specs/enums.txt
index 9d45eba3436..07c7ca0f9d6 100644
--- a/docs/_extra/specs/enums.txt
+++ b/docs/_extra/specs/enums.txt
@@ -11,7 +11,6 @@ GL blocks allocated to Mesa:
        0x8BB0-0x8BBF
 
 Unused EGL blocks allocated to Mesa:
-       0x31DF
        0x3290-0x329F
 
 GL_MESA_packed_depth_stencil
@@ -105,3 +104,7 @@ EGL_MESA_platform_xcb
 
         EGL_PLATFORM_XCB_EXT                    0x31DC
         EGL_PLATFORM_XCB_SCREEN_EXT             0x31DE
+
+EGL_EXT_present_opaque
+
+        EGL_PRESENT_OPAQUE_EXT                  0x31DF