diff --git a/src/app/clusters/time-synchronization-server/time-synchronization-server.cpp b/src/app/clusters/time-synchronization-server/time-synchronization-server.cpp
index 3578e2be6eb8eb..fbee38fc54b0d0 100644
--- a/src/app/clusters/time-synchronization-server/time-synchronization-server.cpp
+++ b/src/app/clusters/time-synchronization-server/time-synchronization-server.cpp
@@ -1095,7 +1095,7 @@ bool emberAfTimeSynchronizationClusterSetUTCTimeCallback(
         commandObj->AddStatus(commandPath, Status::InvalidCommand);
         return true;
     }
-    if (timeSource.HasValue() && (timeSource.Value() < TimeSourceEnum::kNone || timeSource.Value() > TimeSourceEnum::kGnss))
+    if (timeSource.HasValue() && timeSource.Value() == TimeSourceEnum::kUnknownEnumValue)
     {
         commandObj->AddStatus(commandPath, Status::InvalidCommand);
         return true;