diff --git a/ArdSCSinoV2/ArdSCSinoV2.ino b/ArdSCSinoV2/ArdSCSinoV2.ino
index 54c46a7..29b280c 100644
--- a/ArdSCSinoV2/ArdSCSinoV2.ino
+++ b/ArdSCSinoV2/ArdSCSinoV2.ino
@@ -61,7 +61,7 @@
 #define MAX_BLOCKSIZE 1024     // Maximum BLOCK size
 
 // SDFAT
-#define SD1_CONFIG SdSpiConfig(PA4, SHARED_SPI, SD_SCK_MHZ(SPI_FULL_SPEED), &SPI)
+#define SD1_CONFIG SdSpiConfig(PA4, DEDICATED_SPI, SD_SCK_MHZ(SPI_FULL_SPEED), &SPI)
 SdFs SD;
 
 #if DEBUG