diff --git a/src/arch/arm/fastmodel/common/signal_receiver.hh b/src/arch/arm/fastmodel/common/signal_receiver.hh
index b455982392..ac4aa98c6b 100644
--- a/src/arch/arm/fastmodel/common/signal_receiver.hh
+++ b/src/arch/arm/fastmodel/common/signal_receiver.hh
@@ -49,9 +49,11 @@ class SignalReceiver : public amba_pv::signal_slave_base<bool>
   public:
     amba_pv::signal_slave_export<bool> signal_in;
 
-    SignalReceiver(const char *name) : SignalReceiver(name, nullptr) {}
+    SignalReceiver(const std::string &name, OnChangeFunc on_change=nullptr) :
+        SignalReceiver(name.c_str(), on_change)
+    {}
 
-    SignalReceiver(const char *name, OnChangeFunc on_change) :
+    SignalReceiver(const char *name, OnChangeFunc on_change=nullptr) :
         amba_pv::signal_slave_base<bool>(name),
         _state(false), _onChange(on_change)
     {