diff --git a/Firmware/Sd2Card.cpp b/Firmware/Sd2Card.cpp
index 449590f17..5449fccd9 100644
--- a/Firmware/Sd2Card.cpp
+++ b/Firmware/Sd2Card.cpp
@@ -774,7 +774,7 @@ uint8_t Sd2Card::readExt(uint32_t arg, uint8_t* dst, uint16_t count) {
   uint16_t i;
 
   // send command and argument.
-  if (cardCommand(CMD48, arg)) {
+  if (cardCommand(CMD48, arg) && cardCommand(CMD17, arg)) { // CMD48 for W-03, CMD17 for W-04
     error(SD_CARD_ERROR_CMD48);
     goto fail;
   }