diff --git a/sys/dev/iwm/if_iwm.c b/sys/dev/iwm/if_iwm.c
index aa743b894f4b..86a4a9db8306 100644
--- a/sys/dev/iwm/if_iwm.c
+++ b/sys/dev/iwm/if_iwm.c
@@ -793,7 +793,7 @@ iwm_read_firmware(struct iwm_softc *sc)
 			break;
 		}
 
-		case 48: /* undocumented TLV */
+		case IWM_UCODE_TLV_CMD_VERSIONS:
 		case IWM_UCODE_TLV_SDIO_ADMA_ADDR:
 		case IWM_UCODE_TLV_FW_GSCAN_CAPA:
 			/* ignore, not used by current driver */
diff --git a/sys/dev/iwm/if_iwmreg.h b/sys/dev/iwm/if_iwmreg.h
index 67f1bbff0f07..e476e739258f 100644
--- a/sys/dev/iwm/if_iwmreg.h
+++ b/sys/dev/iwm/if_iwmreg.h
@@ -933,6 +933,7 @@ enum iwm_ucode_tlv_type {
 	IWM_UCODE_TLV_FW_DBG_DEST	= 38,
 	IWM_UCODE_TLV_FW_DBG_CONF	= 39,
 	IWM_UCODE_TLV_FW_DBG_TRIGGER	= 40,
+	IWM_UCODE_TLV_CMD_VERSIONS	= 48,
 	IWM_UCODE_TLV_FW_GSCAN_CAPA	= 50,
 	IWM_UCODE_TLV_FW_MEM_SEG	= 51,
 };