diff --git a/sdcard.c b/sdcard.c
index d76f797..9f6590d 100644
--- a/sdcard.c
+++ b/sdcard.c
@@ -186,7 +186,12 @@
 
     // CMD0 - go to idle state
     response[0] = sendIdle();
-    if (response[0] > 0x01) {
+    if (response[0] != 0x01) {
+        // retry solves failure possibly caused by another component
+        // on the same SPI bus
+        response[0] = sendIdle();
+    }
+    if (response[0] != 0x01) {
         printString("SD card error 0\r\n");
         return false;
     }