diff --git a/src/messaging/ReliableMessageMgr.cpp b/src/messaging/ReliableMessageMgr.cpp
index 1107e35ff1a51f..fcf5d0a6078c7e 100644
--- a/src/messaging/ReliableMessageMgr.cpp
+++ b/src/messaging/ReliableMessageMgr.cpp
@@ -146,9 +146,8 @@ void ReliableMessageMgr::ExecuteActions()
                       messageCounter, ChipLogValueExchange(&entry->ec.Get()), entry->sendCount);
         // TODO(#15800): Choose active/idle timeout corresponding to the activity of exchanges of the session.
         System::Clock::Timestamp backoff =
-            ReliableMessageMgr::GetBackoff(entry->ec->GetSessionHandle()->GetMRPConfig().mIdleRetransTimeout, entry->sendCount);
-        entry->nextRetransTime =
-            System::SystemClock().GetMonotonicTimestamp() + backoff;
+            ReliableMessageMgr::GetBackoff(entry->ec->GetSessionHandle()->GetMRPConfig().mActiveRetransTimeout, entry->sendCount);
+        entry->nextRetransTime = System::SystemClock().GetMonotonicTimestamp() + backoff;
         SendFromRetransTable(entry);
         // For test not using async IO loop, the entry may have been removed after send, do not use entry below