diff --git a/tasmota/sendemail_ESP32.ino b/tasmota/sendemail_ESP32.ino
index 256440f65..159df2655 100644
--- a/tasmota/sendemail_ESP32.ino
+++ b/tasmota/sendemail_ESP32.ino
@@ -5,12 +5,14 @@
 
 #ifdef ESP8266
 #ifndef SEND_MAIL32_MINRAM
+#undef SEND_MAIL32_MINRAM
 #define SEND_MAIL32_MINRAM 13*1024
 #endif
 #endif // ESP8266
 
 #ifdef ESP32
 #ifndef SEND_MAIL32_MINRAM
+#undef SEND_MAIL32_MINRAM
 #define SEND_MAIL32_MINRAM 30*1024
 #endif
 #endif // ESP32