diff --git a/src/common/qca-vendor.h b/src/common/qca-vendor.h
index 210f2b223..122262889 100644
--- a/src/common/qca-vendor.h
+++ b/src/common/qca-vendor.h
@@ -1496,6 +1496,12 @@ enum qca_wlan_vendor_attr_p2p_listen_offload {
  * Used with command to configure ACS operation for EHT mode.
  * Disable (flag attribute not present) - EHT disabled and
  * Enable (flag attribute present) - EHT enabled.
+ *
+ * @QCA_WLAN_VENDOR_ATTR_ACS_LAST_SCAN_AGEOUT_TIME: Optional (u32).
+ * Used with command to configure how older scan can be considered for ACS
+ * scoring. In case scan was performed on a partial set of channels configured
+ * with this command within last QCA_WLAN_VENDOR_ATTR_ACS_LAST_SCAN_AGEOUT_TIME
+ * (in ms), scan only the remaining channels.
  */
 enum qca_wlan_vendor_attr_acs_offload {
 	QCA_WLAN_VENDOR_ATTR_ACS_CHANNEL_INVALID = 0,
@@ -1518,6 +1524,7 @@ enum qca_wlan_vendor_attr_acs_offload {
 	QCA_WLAN_VENDOR_ATTR_ACS_EDMG_CHANNEL = 17,
 	QCA_WLAN_VENDOR_ATTR_ACS_PUNCTURE_BITMAP = 18,
 	QCA_WLAN_VENDOR_ATTR_ACS_EHT_ENABLED = 19,
+	QCA_WLAN_VENDOR_ATTR_ACS_LAST_SCAN_AGEOUT_TIME = 20,
 
 	/* keep last */
 	QCA_WLAN_VENDOR_ATTR_ACS_AFTER_LAST,