diff --git a/tasmota/xdrv_02_mqtt.ino b/tasmota/xdrv_02_mqtt.ino
index bf5dc27c2..49f35d579 100644
--- a/tasmota/xdrv_02_mqtt.ino
+++ b/tasmota/xdrv_02_mqtt.ino
@@ -1134,7 +1134,9 @@ void CmndTlsKey(void) {
         memcpy(spi_buffer + tls_obj_store_offset + entry->start, bin_buf, entry->len);
       }
 
-      TlsWriteSpiBuffer(spi_buffer);
+      if (ESP.flashEraseSector(tls_spi_start_sector)) {
+        ESP.flashWrite(tls_spi_start_sector * SPI_FLASH_SEC_SIZE, (uint32_t*) spi_buffer, SPI_FLASH_SEC_SIZE);
+      }
       free(spi_buffer);
       free(bin_buf);
     }
@@ -1146,26 +1148,6 @@ void CmndTlsKey(void) {
   }
 }
 
-
-extern "C" {
-#include "spi_flash.h"
-}
-
-void TlsWriteSpiBuffer(uint8_t *buf) {
-  bool ret = false;
-  SpiFlashOpResult res;
-
-  noInterrupts();
-  res = spi_flash_erase_sector(tls_spi_start_sector);
-  if (SPI_FLASH_RESULT_OK == res) {
-    res = spi_flash_write(tls_spi_start_sector * SPI_FLASH_SEC_SIZE, (uint32_t*) buf, SPI_FLASH_SEC_SIZE);
-    if (SPI_FLASH_RESULT_OK == res) {
-      ret = true;
-    }
-  }
-  interrupts();
-}
-
 #ifdef DEBUG_DUMP_TLS
 // Dump TLS Flash data - don't activate in production to protect your private keys
 uint32_t bswap32(uint32_t x) {