diff --git a/autoload/ale/fix/registry.vim b/autoload/ale/fix/registry.vim
index 47f978e8..f28e84fd 100644
--- a/autoload/ale/fix/registry.vim
+++ b/autoload/ale/fix/registry.vim
@@ -342,7 +342,7 @@ let s:default_registry = {
 \   },
 \   'ktlint': {
 \       'function': 'ale#fixers#ktlint#Fix',
-\       'suggested_filetypes': ['kt'],
+\       'suggested_filetypes': ['kt', 'kotlin'],
 \       'description': 'Fix Kotlin files with ktlint.',
 \   },
 \   'styler': {