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-rw-r--r--macros/luatex/generic/lualibs/lualibs-lua.lua6
1 files changed, 6 insertions, 0 deletions
diff --git a/macros/luatex/generic/lualibs/lualibs-lua.lua b/macros/luatex/generic/lualibs/lualibs-lua.lua
index 6e9606e849..51399216cc 100644
--- a/macros/luatex/generic/lualibs/lualibs-lua.lua
+++ b/macros/luatex/generic/lualibs/lualibs-lua.lua
@@ -35,6 +35,12 @@ if LUAVERSION < 5.2 and jit then
LUAVERSION = 5.2
end
+-- this is lmtx only:
+
+if lua and lua.openfile then
+ io.open = lua.openfile
+end
+
-- lpeg
if not lpeg then