diff --git a/macros/comment selection.lua b/macros/comment selection.lua
new file mode 100644
index 0000000..e06c853
--- /dev/null
+++ b/macros/comment selection.lua	
@@ -0,0 +1,21 @@
+script_name = "Comment selection"
+script_description = "comment (add {} around) highlighted text in a line"
+script_author = "garret"
+script_version = "0.1.0"
+
+local function have_selection_funcs()
+	return aegisub.gui and aegisub.gui.get_selection
+end
+
+local function main(sub, sel, act)
+	local line = sub[act]
+	local start, end_ = aegisub.gui.get_selection()
+	local txt = line.text:sub(1, start -1 ).."{"..line.text:sub(start, end_-1).."}"..line.text:sub(end_, #line.text)
+	line.text = txt
+	sub[act] = line
+	aegisub.set_undo_point(script_name)
+end
+
+if have_selection_funcs() then
+	aegisub.register_macro(script_name, script_description, main)
+end