diff --git a/esp32_marauder/SDInterface.cpp b/esp32_marauder/SDInterface.cpp
index 1ca4b3f..ca57532 100644
--- a/esp32_marauder/SDInterface.cpp
+++ b/esp32_marauder/SDInterface.cpp
@@ -32,9 +32,9 @@ bool SDInterface::initSD() {
                         -   CS (jumper to SD Card GND Pin)
       */
       enum { SPI_SCK = 0, SPI_MISO = 36, SPI_MOSI = 26 };
-      SPIClass SPI_EXT;
-      SPI_EXT.begin(SPI_SCK, SPI_MISO, SPI_MOSI, SD_CS);
-      if (!SD.begin(SD_CS, SPI_EXT)) {
+      this->spiExt = new SPIClass();
+      this->spiExt->begin(SPI_SCK, SPI_MISO, SPI_MOSI, SD_CS);
+      if (!SD.begin(SD_CS, *(this->spiExt))) {
     #else
       if (!SD.begin(SD_CS)) {
     #endif
diff --git a/esp32_marauder/SDInterface.h b/esp32_marauder/SDInterface.h
index e29e62b..8f3026a 100644
--- a/esp32_marauder/SDInterface.h
+++ b/esp32_marauder/SDInterface.h
@@ -26,6 +26,9 @@ extern Settings settings_obj;
 class SDInterface {
 
   private:
+#if defined(MARAUDER_M5STICKC)
+  SPIClass *spiExt;
+#endif
     bool checkDetectPin();
 
   public: