diff --git a/data/plugins/language_lua.lua b/data/plugins/language_lua.lua
index 55cc8ad..f0e457d 100644
--- a/data/plugins/language_lua.lua
+++ b/data/plugins/language_lua.lua
@@ -3,7 +3,7 @@ local syntax = require "core.syntax"
 
 syntax.add {
   name = "Lua",
-  files = "%.lua$",
+  files = { "%.lua$", "%.rockspec$" },
   headers = "^#!.*[ /]lua",
   comment = "--",
   block_comment = { "--[[", "]]" },