diff --git a/src/core/thread/mle.cpp b/src/core/thread/mle.cpp
index 038caa903..b5da6fa17 100644
--- a/src/core/thread/mle.cpp
+++ b/src/core/thread/mle.cpp
@@ -3491,6 +3491,8 @@ otError Mle::HandleChildUpdateResponse(const Message &aMessage, const Ip6::Messa
         mParent.SetState(Neighbor::kStateValid);
         SetStateChild(GetRloc16());
 
+        mRetrieveNewNetworkData = true;
+
         // fall through
 
     case OT_DEVICE_ROLE_CHILD:
diff --git a/src/core/utils/slaac_address.cpp b/src/core/utils/slaac_address.cpp
index d95eb7c7b..de1dbef1b 100644
--- a/src/core/utils/slaac_address.cpp
+++ b/src/core/utils/slaac_address.cpp
@@ -115,6 +115,7 @@ void Slaac::UpdateAddresses(otInstance *    aInstance,
             if (otIp6PrefixMatch(&config.mPrefix.mPrefix, &address->mAddress) >= config.mPrefix.mLength &&
                 config.mPrefix.mLength == address->mPrefixLength)
             {
+                otIp6AddUnicastAddress(aInstance, address);
                 found = true;
                 break;
             }