diff --git a/runtime/autoload/dist/ft.vim b/runtime/autoload/dist/ft.vim
index d5c21ac..8f74445 100644
--- a/runtime/autoload/dist/ft.vim
+++ b/runtime/autoload/dist/ft.vim
@@ -1087,5 +1087,18 @@
   endif
 enddef
 
+export def FTlsl()
+  if exists("g:filetype_lsl")
+    exe "setf " .. g:filetype_lsl
+  endif
+
+  var line = getline(nextnonblank(1))
+  if line =~ '^\s*%' || line =~# ':\s*trait\s*$'
+    setf larch
+  else
+    setf lsl
+  endif
+enddef
+
 # Uncomment this line to check for compilation errors early
 # defcompile