diff --git a/library/src/calculate_price.cpp b/library/src/calculate_price.cpp
index f2c43df..85cdd74 100644
--- a/library/src/calculate_price.cpp
+++ b/library/src/calculate_price.cpp
@@ -399,11 +399,9 @@ int CALCULATE_LIBRARY_API get_zone_nr(int zone)
         QFile zone("/mnt/system_data/zone_nr");
         if (zone.exists()) {
             QFileInfo finfo(zone);
-            if (finfo.size() <= 4) { // decimal 000\n
-                if (zone.open(QIODevice::ReadOnly | QIODevice::Text)) {
-                    QTextStream in(&zone);
-                    return in.readLine(100).toInt();
-                }
+            if (zone.open(QIODevice::ReadOnly | QIODevice::Text)) {
+                QTextStream in(&zone);
+                return in.readLine(100).toInt();
             }
         }
         return -1;