diff --git a/autoload/ale/fixers/cmakeformat.vim b/autoload/ale/fixers/cmakeformat.vim
index f40ed6ed..dcc29cf3 100644
--- a/autoload/ale/fixers/cmakeformat.vim
+++ b/autoload/ale/fixers/cmakeformat.vim
@@ -10,9 +10,7 @@ function! ale#fixers#cmakeformat#Fix(buffer) abort
 
     return {
     \   'command': ale#Escape(l:executable)
-    \       . ' -i '
     \       . (empty(l:options) ? '' : ' ' . l:options)
-    \       . ' %t',
-    \   'read_temporary_file': 1,
+    \       . ' -'
     \}
 endfunction
diff --git a/test/fixers/test_cmakeformat_fixer_callback.vader b/test/fixers/test_cmakeformat_fixer_callback.vader
index 9263d6fa..545fe067 100644
--- a/test/fixers/test_cmakeformat_fixer_callback.vader
+++ b/test/fixers/test_cmakeformat_fixer_callback.vader
@@ -18,10 +18,8 @@ Execute(The cmakeformat callback should return the correct default values):
 
   AssertEqual
   \ {
-  \   'read_temporary_file': 1,
   \   'command': ale#Escape('xxxinvalid')
-  \     . ' -i '
-  \     . ' %t',
+  \     . ' -'
   \ },
   \ ale#fixers#cmakeformat#Fix(bufnr(''))
 
@@ -31,10 +29,8 @@ Execute(The cmakeformat callback should include custom cmakeformat options):
 
   AssertEqual
   \ {
-  \   'read_temporary_file': 1,
   \   'command': ale#Escape('xxxinvalid')
-  \     . ' -i '
   \     . ' ' . g:ale_cmake_cmakeformat_options
-  \     . ' %t',
+  \     . ' -',
   \ },
   \ ale#fixers#cmakeformat#Fix(bufnr(''))