diff --git a/measurement_main.py b/measurement_main.py
index 162394a..76a1456 100644
--- a/measurement_main.py
+++ b/measurement_main.py
@@ -239,7 +239,7 @@ def monitor_serial(ser, output_file):
             #    .replace(";;OK", ";")
             #    .replace(";;", ";")
             #)
-            write_to_file(output_file, response + "\n")
+            write_to_file(output_file, response + ";;;\n")
     except:
         if not ser.is_open:
             print_message("Serial port is closed. Exit monitoring thread.")