diff --git a/rclcpp/include/rclcpp/executor.hpp b/rclcpp/include/rclcpp/executor.hpp
index f6ee2df..edebfeb 100644
--- a/rclcpp/include/rclcpp/executor.hpp
+++ b/rclcpp/include/rclcpp/executor.hpp
@@ -42,7 +42,7 @@ class Executor
 public:
   RCLCPP_MAKE_SHARED_DEFINITIONS(Executor);
 
-  Executor(memory_strategy::MemoryStrategy::SharedPtr ms =
+  explicit Executor(memory_strategy::MemoryStrategy::SharedPtr ms =
     memory_strategy::create_default_strategy())
   : interrupt_guard_condition_(rmw_create_guard_condition()),
     memory_strategy_(ms)
diff --git a/rclcpp/include/rclcpp/executors/multi_threaded_executor.hpp b/rclcpp/include/rclcpp/executors/multi_threaded_executor.hpp
index 40f0c5d..68c6e29 100644
--- a/rclcpp/include/rclcpp/executors/multi_threaded_executor.hpp
+++ b/rclcpp/include/rclcpp/executors/multi_threaded_executor.hpp
@@ -40,7 +40,9 @@ class MultiThreadedExecutor : public executor::Executor
 public:
   RCLCPP_MAKE_SHARED_DEFINITIONS(MultiThreadedExecutor);
 
-  MultiThreadedExecutor()
+  MultiThreadedExecutor(memory_strategy::MemoryStrategy::SharedPtr ms =
+    memory_strategy::create_default_strategy())
+  : executor::Executor(ms)
   {
     number_of_threads_ = std::thread::hardware_concurrency();
     if (number_of_threads_ == 0) {
diff --git a/rclcpp/include/rclcpp/executors/single_threaded_executor.hpp b/rclcpp/include/rclcpp/executors/single_threaded_executor.hpp
index fa8e7e0..2fa1e02 100644
--- a/rclcpp/include/rclcpp/executors/single_threaded_executor.hpp
+++ b/rclcpp/include/rclcpp/executors/single_threaded_executor.hpp
@@ -41,7 +41,9 @@ class SingleThreadedExecutor : public executor::Executor
 public:
   RCLCPP_MAKE_SHARED_DEFINITIONS(SingleThreadedExecutor);
 
-  SingleThreadedExecutor() {}
+  SingleThreadedExecutor(memory_strategy::MemoryStrategy::SharedPtr ms =
+    memory_strategy::create_default_strategy())
+  : executor::Executor(ms) {}
 
   virtual ~SingleThreadedExecutor() {}