diff --git a/doc/cmp.txt b/doc/cmp.txt
index d1430bb..7680a02 100644
--- a/doc/cmp.txt
+++ b/doc/cmp.txt
@@ -603,7 +603,7 @@ How to setup on the specific buffer?~
 
 You can setup buffer specific configuration like this.
 >
-  cmp.setup.filetype('markdown', {
+  cmp.setup.filetype({ 'markdown', 'help' }, {
     sources = {
       { name = 'path' },
       { name = 'buffer' },
diff --git a/lua/cmp/config.lua b/lua/cmp/config.lua
index 7fc53e8..6db2fa6 100644
--- a/lua/cmp/config.lua
+++ b/lua/cmp/config.lua
@@ -45,11 +45,13 @@ end
 
 ---Set configuration for filetype
 ---@param c cmp.ConfigSchema
----@param filetype string
-config.set_filetype = function(c, filetype)
-  local revision = (config.filetypes[filetype] or {}).revision or 1
-  config.filetypes[filetype] = c or {}
-  config.filetypes[filetype].revision = revision + 1
+---@param filetypes string[]|string
+config.set_filetype = function(c, filetypes)
+  for _, filetype in ipairs(type(filetypes) == 'table' and filetypes or { filetypes }) do
+    local revision = (config.filetypes[filetype] or {}).revision or 1
+    config.filetypes[filetype] = c or {}
+    config.filetypes[filetype].revision = revision + 1
+  end
 end
 
 ---Set configuration for cmdline