diff --git a/share/completions/lua.fish b/share/completions/lua.fish
index 21c8d1e00..1bfc1257d 100644
--- a/share/completions/lua.fish
+++ b/share/completions/lua.fish
@@ -1,6 +1,7 @@
 
 complete -c lua -s e -d 'Execute string' -x
-complete -c lua -s l -d 'Require library' -xa "( find /usr/lib/lua/ -name \*.so -printf '%f\n' | sed 's/.so//' )"
+# Try the most common lib directories, silencing errors in case they don't exist.
+complete -c lua -s l -d 'Require library' -xa "(find /usr/lib{,32,64}/lua/ -name \*.so -printf '%f\n' ^/dev/null | string replace -r '.so\$' '')"
 complete -c lua -s i -d 'Enter interactive mode after executing script'
 complete -c lua -s v -d 'Show version'
 complete -c lua -s h -l help -d 'Print help and exit'