diff --git a/runtime/filetype.vim b/runtime/filetype.vim
index a8e6261..2b008fc 100644
--- a/runtime/filetype.vim
+++ b/runtime/filetype.vim
@@ -2258,6 +2258,9 @@ au BufNewFile,BufRead *.zsql			call s:SQL()
 " Z80 assembler asz80
 au BufNewFile,BufRead *.z8a			setf z8a
 
+" Nix
+au BufNewFile,BufRead *.nix		setf nix
+
 augroup END
 
 
@@ -2440,3 +2443,5 @@ endfunc
 " Restore 'cpoptions'
 let &cpo = s:cpo_save
 unlet s:cpo_save
+
+