diff --git a/doc/mgmt-api.txt b/doc/mgmt-api.txt
index 2bc2a88..3f593f9 100644
--- a/doc/mgmt-api.txt
+++ b/doc/mgmt-api.txt
@@ -2462,6 +2462,7 @@ Read Extended Controller Index List Command
 		0x06	SDIO
 		0x07	SPI
 		0x08	I2C
+		0x09	SMD
 
 	Controllers marked as RAW only operation are currently not listed
 	by this command.