diff --git a/src/WiFiConfig.cpp b/src/WiFiConfig.cpp
index 82b9421..df4010a 100644
--- a/src/WiFiConfig.cpp
+++ b/src/WiFiConfig.cpp
@@ -746,7 +746,7 @@ bool WiFiConfig::_storeString(unsigned int start, size_t maxlen, String &string)
 
   WiFi.softAPmacAddress(mac);
   EEPROM.write(start, (uint8_t)top); // ulozime delku retezce (pouzite pr kontrolu pri vycitani)
-  for (i = start + 1; i < start + maxlen + 1; ++i)
+  for (i = start + 1; i < start + top + 1; ++i)
   {
     c = string[si];
     c ^= mac[enciphidx];