diff --git a/companion/src/firmwares/opentx/opentxinterface.cpp b/companion/src/firmwares/opentx/opentxinterface.cpp
index 9429e856f..8aa4609da 100644
--- a/companion/src/firmwares/opentx/opentxinterface.cpp
+++ b/companion/src/firmwares/opentx/opentxinterface.cpp
@@ -327,7 +327,7 @@ bool OpenTxEepromInterface::load(RadioData &radioData, const uint8_t *eeprom, in
         size=2048;
       }
     } else {
-      std::cout << " wrong size (" << size << ")\n";
+      std::cout << " wrong size (" << size << "/" << getEEpromSize() << ")\n";
       return false;
     }
   }
diff --git a/radio/src/eeprom_rlc.cpp b/radio/src/eeprom_rlc.cpp
index be641adaf..24b983cb5 100644
--- a/radio/src/eeprom_rlc.cpp
+++ b/radio/src/eeprom_rlc.cpp
@@ -262,6 +262,12 @@ void eepromFormat()
 {
   ENABLE_SYNC_WRITE(true);
 
+#ifdef SIMU
+  // write zero to the end of the new EEPROM file to set it's proper size
+  uint8_t dummy = 0;
+  eepromWriteBlock(&dummy, EESIZE-1, 1);
+#endif
+
   memclear(&eeFs, sizeof(eeFs));
   eeFs.version  = EEFS_VERS;
   eeFs.mySize   = sizeof(eeFs);