diff --git a/include/nuttx/mmcsd.h b/include/nuttx/mmcsd.h
index 04aedeab3ac..83432af88b3 100644
--- a/include/nuttx/mmcsd.h
+++ b/include/nuttx/mmcsd.h
@@ -49,6 +49,7 @@
 #define MMC_RPMB_READ_CNT       0x02
 #define MMC_RPMB_WRITE          0x03
 #define MMC_RPMB_READ           0x04
+#define MMC_RPMB_READ_RESP      0x05
 
 /****************************************************************************
  * Public Types