diff --git a/cores/esp8266/Updater.cpp b/cores/esp8266/Updater.cpp
index e5224e3814..93149033c7 100644
--- a/cores/esp8266/Updater.cpp
+++ b/cores/esp8266/Updater.cpp
@@ -282,6 +282,8 @@ bool UpdaterClass::end(bool evenIfRemaining){
       return false;
     }
     free(sig);
+    _size = binSize; // Adjust size to remove signature, not part of bin payload
+
 #ifdef DEBUG_UPDATER
     DEBUG_UPDATER.printf_P(PSTR("[Updater] Signature matches\n"));
 #endif