diff --git a/autoload/doge/helpers.vim b/autoload/doge/helpers.vim
index 92b0c7c8..53605bbe 100644
--- a/autoload/doge/helpers.vim
+++ b/autoload/doge/helpers.vim
@@ -135,6 +135,17 @@ function! doge#helpers#deepsubstitute(input, search, replacement, flags) abort
   return eval(substitute(string(a:input), a:search, a:replacement, a:flags))
 endfunction
 
+"" @public
+" Get the current filetype. Returns the original filetype if the current
+" filetype is an alias.
+function! doge#helpers#get_filetype() abort
+  for [l:ft, l:aliases] in items(get(g:, 'doge_filetype_aliases', []))
+    if index(l:aliases, &filetype) >= 0
+      return l:ft
+    endif
+  endfor
+  return &filetype
+endfunction
 
 let &cpoptions = s:save_cpo
 unlet s:save_cpo
diff --git a/autoload/doge/pattern.vim b/autoload/doge/pattern.vim
index 3741a63f..9ef1a680 100644
--- a/autoload/doge/pattern.vim
+++ b/autoload/doge/pattern.vim
@@ -51,7 +51,7 @@ function! doge#pattern#generate(pattern) abort
   endif
 
   try
-    let l:preprocess_fn = printf('doge#preprocessors#%s#tokens', &filetype)
+    let l:preprocess_fn = printf('doge#preprocessors#%s#tokens', doge#helpers#get_filetype())
     call function(l:preprocess_fn)(l:tokens)
   catch /^Vim\%((\a\+)\)\=:E117/
   endtry
@@ -73,7 +73,7 @@ function! doge#pattern#generate(pattern) abort
 
     " Preprocess the extracted parameter tokens.
     try
-      let l:preprocess_fn = printf('doge#preprocessors#%s#parameter_tokens', &filetype)
+      let l:preprocess_fn = printf('doge#preprocessors#%s#parameter_tokens', doge#helpers#get_filetype())
       call function(l:preprocess_fn)(l:param_tokens)
     catch /^Vim\%((\a\+)\)\=:E117/
     endtry
@@ -127,7 +127,7 @@ function! doge#pattern#generate(pattern) abort
   endif
 
   try
-    let l:preprocess_fn = printf('doge#preprocessors#%s#insert_position', &filetype)
+    let l:preprocess_fn = printf('doge#preprocessors#%s#insert_position', doge#helpers#get_filetype())
     let l:preprocessed_insert_position = function(l:preprocess_fn)(l:comment_lnum_insert_position)
     let l:comment_lnum_insert_position = l:preprocessed_insert_position
 
diff --git a/doc/doge.txt b/doc/doge.txt
index e352de1b..074e0a41 100644
--- a/doc/doge.txt
+++ b/doc/doge.txt
@@ -198,6 +198,10 @@ doge#helpers#deepsubstitute({input}, {search}, {replacement}, {flags})
                                                *doge#helpers#deepsubstitute()*
   Substitute input recursively.
 
+doge#helpers#get_filetype()                      *doge#helpers#get_filetype()*
+  Get the current filetype. Returns the original filetype if the current
+  filetype is an alias.
+
 doge#indent#add({lnum}, {text})                            *doge#indent#add()*
   Indent a string based on a given line its indent, based on the user setting.
 
diff --git a/doc/tags b/doc/tags
index d9b44243..2999691a 100644
--- a/doc/tags
+++ b/doc/tags
@@ -17,6 +17,7 @@ doge#helpers#count()	doge.txt	/*doge#helpers#count()*
 doge#helpers#deepextend()	doge.txt	/*doge#helpers#deepextend()*
 doge#helpers#deepsubstitute()	doge.txt	/*doge#helpers#deepsubstitute()*
 doge#helpers#generator()	doge.txt	/*doge#helpers#generator()*
+doge#helpers#get_filetype()	doge.txt	/*doge#helpers#get_filetype()*
 doge#helpers#keyseq()	doge.txt	/*doge#helpers#keyseq()*
 doge#helpers#placeholder()	doge.txt	/*doge#helpers#placeholder()*
 doge#helpers#trim()	doge.txt	/*doge#helpers#trim()*