diff --git a/lune/rojo/sourcemap_generator.luau b/lune/rojo/sourcemap_generator.luau
index 1ab4a7c..67ee112 100644
--- a/lune/rojo/sourcemap_generator.luau
+++ b/lune/rojo/sourcemap_generator.luau
@@ -1,11 +1,15 @@
 local fs = require("@lune/fs")
 local process = require("@lune/process")
+local serde = require("@lune/serde")
 local stdio = require("@lune/stdio")
 
 local package_directory = process.args[1]
 
 if fs.isFile(package_directory .. "/default.project.json") then
 	process.spawn("rojo", { "sourcemap", package_directory }, { cwd = process.cwd, stdio = "forward" })
+elseif fs.isFile(package_directory .. "/init.luau") then
+	local sourcemap = { filePaths = { "init.luau" } }
+	stdio.write(serde.encode("json", sourcemap, false))
 else
 	-- use stderr to avoid this being parsed as the output of the sourcemap command
 	stdio.ewrite("no default.project.json found in " .. package_directory)