diff --git a/init.lua b/init.lua
index 692b027..8c6cd8c 100644
--- a/init.lua
+++ b/init.lua
@@ -74,7 +74,7 @@ function email.get_formspec(name)
 
 	local fs = "vertlabel[0,0;Your Inbox]"
 
-	function row(fs, c1, date, from, msg)
+	local function row(fs, c1, date, from, msg)
 		date = minetest.formspec_escape(date)
 		from = minetest.formspec_escape(from)
 		msg = minetest.formspec_escape(msg)