diff --git a/requests.h b/requests.h
index 18b1bc4..f093fd2 100644
--- a/requests.h
+++ b/requests.h
@@ -6,6 +6,7 @@
 #define RQ_GCN64_GET_CONFIG_PARAM		0x02
 #define RQ_GCN64_SUSPEND_POLLING		0x03
 #define RQ_GCN64_GET_VERSION			0x04
+#define RQ_GCN64_GET_SIGNATURE			0x05
 #define RQ_GCN64_RAW_SI_COMMAND			0x80
 #define RQ_GCN64_JUMP_TO_BOOTLOADER		0xFF