diff --git a/luametalatex-basecallbacks.lua b/luametalatex-basecallbacks.lua
index 7b8cee9..d298131 100644
--- a/luametalatex-basecallbacks.lua
+++ b/luametalatex-basecallbacks.lua
@@ -35,7 +35,7 @@ if status.ini_version then
     callbacks.find_data_file = nil
   end
   function callbacks.find_data_file(name)
-    if name == 'ltexpl.ltx' then
+    if name == 'expl3.ltx' then
       name = 'luametalatex-ltexpl-hook'
     end
     return kpse.find_file(name, 'tex', true)
diff --git a/luametalatex-ltexpl-hook.tex b/luametalatex-ltexpl-hook.tex
index 74d45ba..9d94c6f 100644
--- a/luametalatex-ltexpl-hook.tex
+++ b/luametalatex-ltexpl-hook.tex
@@ -8,4 +8,4 @@
 \ifx\@tfor\undefined
   \def\@tfor#1\do#2{}
 \fi
-\input ltexpl.ltx
+\input expl3.ltx