diff --git a/src/bridge.h b/src/bridge.h
index 81f4ca4..a43fe12 100644
--- a/src/bridge.h
+++ b/src/bridge.h
@@ -275,7 +275,7 @@ class BridgeClassUpdater {
     BridgeClassUpdater() = delete; // prevents instantiation
 };
 
-BridgeClass Bridge(Serial1);
+inline BridgeClass Bridge(Serial1);
 
 inline void updateEntryPoint(void *, void *, void *){
     while (true) {
@@ -291,7 +291,7 @@ static void safeUpdate(){
 }
 
 // leave as is
-void __loopHook(void){
+void __attribute__((weak)) __loopHook(void){
     k_yield();
     safeUpdate();
 }
diff --git a/src/hci.h b/src/hci.h
index b313f8e..a992e8b 100644
--- a/src/hci.h
+++ b/src/hci.h
@@ -149,7 +149,7 @@ template<size_t BufferSize=HCI_BUFFER_SIZE> class BridgeHCI {
 extern BridgeClass Bridge;
 
 namespace RouterBridge {
-    BridgeHCI<> HCI(Bridge);
+    inline BridgeHCI<> HCI(Bridge);
 }
 
 // Make available in global namespace for backward compatibility
diff --git a/src/monitor.h b/src/monitor.h
index 02b9d16..94fc551 100644
--- a/src/monitor.h
+++ b/src/monitor.h
@@ -156,6 +156,7 @@ class BridgeMonitor: public Stream {
 };
 
 extern BridgeClass Bridge;
-BridgeMonitor<> Monitor(Bridge);
+
+inline BridgeMonitor<> Monitor(Bridge);
 
 #endif // BRIDGE_MONITOR_H
\ No newline at end of file