diff --git a/rclcpp/include/rclcpp/node_interfaces/node_time_source.hpp b/rclcpp/include/rclcpp/node_interfaces/node_time_source.hpp
index 1c9afebe1f..1594d5f8e5 100644
--- a/rclcpp/include/rclcpp/node_interfaces/node_time_source.hpp
+++ b/rclcpp/include/rclcpp/node_interfaces/node_time_source.hpp
@@ -48,7 +48,7 @@ class NodeTimeSource : public NodeTimeSourceInterface
     rclcpp::node_interfaces::NodeLoggingInterface::SharedPtr node_logging,
     rclcpp::node_interfaces::NodeClockInterface::SharedPtr node_clock,
     rclcpp::node_interfaces::NodeParametersInterface::SharedPtr node_parameters,
-    const rclcpp::QoS & qos = rclcpp::RosoutQoS(),
+    const rclcpp::QoS & qos = rclcpp::ClockQoS(),
     bool use_clock_thread = true
   );
 
diff --git a/rclcpp/src/rclcpp/time_source.cpp b/rclcpp/src/rclcpp/time_source.cpp
index 61c5fdd785..7e1226e1b2 100644
--- a/rclcpp/src/rclcpp/time_source.cpp
+++ b/rclcpp/src/rclcpp/time_source.cpp
@@ -420,7 +420,7 @@ class TimeSource::NodeState : public std::enable_shared_from_this<NodeState>
       node_parameters_,
       node_topics_,
       "/clock",
-      rclcpp::QoS(KeepLast(1)).best_effort(),
+      qos_,
       [state = std::weak_ptr<NodeState>(this->shared_from_this())](
         std::shared_ptr<const rosgraph_msgs::msg::Clock> msg) {
         if (auto state_ptr = state.lock()) {