diff --git a/plat/intel/soc/common/include/socfpga_mailbox.h b/plat/intel/soc/common/include/socfpga_mailbox.h
index e1c128b..09dd117 100644
--- a/plat/intel/soc/common/include/socfpga_mailbox.h
+++ b/plat/intel/soc/common/include/socfpga_mailbox.h
@@ -42,6 +42,7 @@
 #define MBOX_CMD_CANCEL			0x03
 #define MBOX_CMD_VAB_SRC_CERT		0x0B
 #define MBOX_CMD_GET_IDCODE		0x10
+#define MBOX_CMD_GET_USERCODE		0x13
 #define MBOX_CMD_REBOOT_HPS		0x47
 
 /* Reconfiguration Commands */