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-rw-r--r--luaotfload-extralibs.lua7
1 files changed, 6 insertions, 1 deletions
diff --git a/luaotfload-extralibs.lua b/luaotfload-extralibs.lua
index 2236631..618808f 100644
--- a/luaotfload-extralibs.lua
+++ b/luaotfload-extralibs.lua
@@ -230,7 +230,12 @@ attributes.private = attributes.private or function (attr_name)
return res
end
-attributes.unsetvalue = luatexbase.get_unset_value()
+if luatexbase.get_unset_value then
+ attributes.unsetvalue = luatexbase.get_unset_value()
+else -- old luatexbase
+ attributes.unsetvalue = (luatexbase.luatexversion < 37) and -1
+ or -2147483647
+end
-----------------------------------------------------------------------
--- luat-sto