diff --git a/CHANGES.md b/CHANGES.md
index c40eb4237..e12f2fed2 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -99,6 +99,7 @@ Changes from ns-3.37 to ns-3.38
 * (wifi) Added a new attribute **NMaxInflights** to QosTxop to set the maximum number of links on which an MPDU can be simultaneously in-flight.
 * (wifi) New API has been introduced to support 802.11be Multi-Link Operations (MLO)
 * (wifi) New API has been introduced to support 802.11ax dual NAV, UL MU CS, and MU-RTS/CTS features
+* (wifi) Added a new attribute **TrackSignalsFromInactiveInterfaces** to SpectrumWifiPhy to select whether it should track signals from inactive spectrum PHY interfaces.
 
 ### Changes to existing API
 
@@ -109,6 +110,8 @@ Changes from ns-3.37 to ns-3.38
 * (lr-wpan) Added file `src/lr-wpan/model/lr-wpan-constants.h` with common constants of the LR-WPAN module.
 * (lr-wpan) Removed the functions `LrWpanCsmaCa::GetUnitBackoffPeriod()` and `LrWpanCsmaCa::SetUnitBackoffPeriod()`, and moved the constant `m_aUnitBackoffPeriod` to `src/lr-wpan/model/lr-wpan-constants.h`.
 * (lr-wpan) `LrWpanHelper::CreateAssociatedPan` replace `LrWpanHelper::AssociateToPan` and is able to create an associated PAN of the devices with both short addresses (16-bits) and extended addresses (EUI-64 bits).
+* (wifi) `SpectrumWifiPhy::SetChannel` has been renamed to `SpectrumWifiPhy::AddChannel` and has one additional parameter (optional) to indicate the frequency range that is covered by the provided spectrum channel. By default, the whole wifi spectrum channel is considered.
+* The `WifiSpectrumHelper::SetChannel` functions used for MLO do no longer take a link ID parameter, but instead takes the frequency range covered by the spectrum channel and have been renamed to `WifiSpectrumHelper::AddChannel`. The remaining `WifiSpectrumHelper::SetChannel` functions assume the whole wifi spectrum range is used by the spectrum channel.
 
 ### Changes to build system