diff --git a/gcode-axis-offset.py b/gcode-axis-offset.py
index 3c84fd8..23f2aaf 100755
--- a/gcode-axis-offset.py
+++ b/gcode-axis-offset.py
@@ -6,13 +6,20 @@
 offset = float(sys.argv[3])
 
 with open(filename) as f:
-        lista_linija = f.read().splitlines() 
-
+	lista_linija = f.read().splitlines()
 
 for line in lista_linija:
-  for word in line.split(" "):
-    if (re.search(axis + ".*", word)):
-      print(axis + str(round(float(word[1:]) + offset,4)),end=" ")
-    else:
-      print(word, end=" ")
-  print()
+	if not line.startswith(";") and re.search(axis + ".*", line):
+		codeAndComment = line.split(";")
+		if (codeAndComment[0]):
+			for word in codeAndComment[0].split(" "):
+				if (re.search(axis + ".*", word)):
+					print(axis + str(round(float(word[1:]) + offset,4)),end=" ")
+				else:
+					print(word, end=" ")
+		if len(codeAndComment) > 1:
+			print(";" + codeAndComment[1])
+		else:
+			print()
+	else:
+		print(line)