diff --git a/Home.md b/Home.md
index 96c78f2..535131b 100644
--- a/Home.md
+++ b/Home.md
@@ -868,7 +868,7 @@ void loop()
      }
 
      if (seg_value_4 == 'P') {
-       measured_user_id = char_to_int(seg_value_1) - 1;
+       measured_user_id = char_to_int(seg_value_1) + char_to_int(seg_value_2)*10;
      }
 
     sample_count = 0;