diff --git a/mesecons_microcontroller/init.lua b/mesecons_microcontroller/init.lua
index 2ff6596..bb040f1 100644
--- a/mesecons_microcontroller/init.lua
+++ b/mesecons_microcontroller/init.lua
@@ -66,6 +66,7 @@ end
 function update_yc(pos)
 	local meta = minetest.env:get_meta(pos)
 	local code = meta:get_string("code")
+	code = yc_code_remove_commentary(code)
 	code = string.gsub(code, " ", "")	--Remove all spaces
 	code = string.gsub(code, "	", "")	--Remove all tabs
 	if parse_yccode(code, pos) == nil then
@@ -75,6 +76,15 @@ function update_yc(pos)
 	end
 end
 
+function yc_code_remove_commentary(code)
+	for i = 1, #code do
+		if code:sub(i, i) == ":" then
+			return code:sub(1, i-1)
+		end
+	end
+	return code
+end
+
 function parse_yccode(code, pos)
 	local endi = 1
 	local L = yc_get_portstates(pos)