diff --git a/index.js b/index.js
index 29b1373..bab7387 100644
--- a/index.js
+++ b/index.js
@@ -66,7 +66,7 @@ P1Reader.prototype.parsePackage = function(rawData) {
     data.electricity.date = new Date();
     var lines = rawData.split("\r\n");
     // Not a full package (not enough lines)
-    if(lines.length < 19) {
+    if(lines.length < 18) {
         return null;
     }