diff --git a/src/hci_cmd.h b/src/hci_cmd.h
index 8cd485064..e6a527c99 100644
--- a/src/hci_cmd.h
+++ b/src/hci_cmd.h
@@ -351,6 +351,9 @@ typedef enum {
     HCI_OPCODE_HCI_RTK_CONFIGURE_SCO_ROUTING = HCI_OPCODE (0x3f, 0x93),
     HCI_OPCODE_HCI_RTK_READ_CARD_INFO = 0xFC61,
 
+    // Zephyr
+    HCI_OPCODE_HCI_ZEPHYR_READ_STATIC_ADDRESS = 0xFC09,
+
     // Marvell/NXP
     HCI_OPCODE_HCI_NXP_WRITE_PCM_I2S_SETTINGS      = 0xFC07,
     HCI_OPCODE_HCI_NXP_SET_SCO_DATA_PATH	       = 0xFC1D,