diff --git a/include/etl/message_bus.h b/include/etl/message_bus.h
index 0cfa5ee0..134d0940 100644
--- a/include/etl/message_bus.h
+++ b/include/etl/message_bus.h
@@ -414,7 +414,7 @@ namespace etl
   /// Send a message to a bus.
   //***************************************************************************
   static inline void send_message(etl::imessage_bus&   bus,
-                           const etl::imessage& message)
+                                  const etl::imessage& message)
   {
     bus.receive(message);
   }
@@ -423,8 +423,8 @@ namespace etl
   /// Send a message to a bus.
   //***************************************************************************
   static inline void send_message(etl::imessage_bus&       bus,
-                           etl::message_router_id_t id,
-                           const etl::imessage&     message)
+                                  etl::message_router_id_t id,
+                                  const etl::imessage&     message)
   {
     bus.receive(id, message);
   }
diff --git a/include/etl/message_router.h b/include/etl/message_router.h
index f442ad71..50b72055 100644
--- a/include/etl/message_router.h
+++ b/include/etl/message_router.h
@@ -319,6 +319,15 @@ namespace etl
     destination.receive(message);
   }
 
+  //***************************************************************************
+  /// Send a shared message to a router.
+  //***************************************************************************
+  static inline void send_message(etl::imessage_router& destination,
+                                  etl::shared_message message)
+  {
+    destination.receive(message);
+  }
+
 //*************************************************************************************************
 // For C++17 and above.
 //*************************************************************************************************
diff --git a/test/test_shared_message.cpp b/test/test_shared_message.cpp
index bdb1af9a..6983466d 100644
--- a/test/test_shared_message.cpp
+++ b/test/test_shared_message.cpp
@@ -230,7 +230,7 @@ namespace
       bus.receive(sm2);
       bus.receive(sm1);
       bus.receive(sm3);
-      bus.receive(sm4);            // sm4 is a copy of sm1
+      etl::send_message(bus, sm4); // sm4 is a copy of sm1. Use non-member function.
       bus.receive(RouterId2, sm1); // Only send sm1 to Router2
 
       CHECK(sm1.is_valid());