diff --git a/autoload/elixir/util.vim b/autoload/elixir/util.vim
index 927f92b..0187590 100644
--- a/autoload/elixir/util.vim
+++ b/autoload/elixir/util.vim
@@ -15,9 +15,7 @@ function! elixir#util#get_filename(word) abort
 
   " convert to snake_case
   let word = substitute(word,'\(\u\+\)\(\u\l\)','\1_\2','g')
-  let word = substitute(word,'\(\u\+\)\(\u\l\)','\1_\2','g')
   let word = substitute(word,'\(\l\|\d\)\(\u\)','\1_\2','g')
-  let word = substitute(word,'-','_','g')
   let word = tolower(word)
 
   return word