diff --git a/src/lib/arch/ArchDaemonNone.cpp b/src/lib/arch/ArchDaemonNone.cpp
index 95591d145..8323d8313 100644
--- a/src/lib/arch/ArchDaemonNone.cpp
+++ b/src/lib/arch/ArchDaemonNone.cpp
@@ -21,7 +21,7 @@ void ArchDaemonNone::uninstallDaemon(const char *)
   // do nothing
 }
 
-int ArchDaemonNone::daemonize(const char *name, DaemonFunc func)
+int ArchDaemonNone::daemonize(const char *name, DaemonFunc const &func)
 {
   // simply forward the call to func.  obviously, this doesn't
   // do any daemonizing.
diff --git a/src/lib/arch/ArchDaemonNone.h b/src/lib/arch/ArchDaemonNone.h
index 885c5b3b4..541410b2d 100644
--- a/src/lib/arch/ArchDaemonNone.h
+++ b/src/lib/arch/ArchDaemonNone.h
@@ -29,7 +29,7 @@ public:
       const char *name, const char *description, const char *pathname, const char *commandLine, const char *dependencies
   ) override;
   void uninstallDaemon(const char *name) override;
-  int daemonize(const char *name, DaemonFunc func) override;
+  int daemonize(const char *name, DaemonFunc const &func) override;
   bool canInstallDaemon(const char *name) override;
   bool isDaemonInstalled(const char *name) override;
   void installDaemon() override;
diff --git a/src/lib/arch/IArchDaemon.h b/src/lib/arch/IArchDaemon.h
index a730ef576..881fb3ed7 100644
--- a/src/lib/arch/IArchDaemon.h
+++ b/src/lib/arch/IArchDaemon.h
@@ -88,7 +88,7 @@ public:
     \c ArchMiscWindows::daemonFailed() to indicate startup failure.
   </ul>
   */
-  virtual int daemonize(const char *name, DaemonFunc func) = 0;
+  virtual int daemonize(const char *name, DaemonFunc const &func) = 0;
 
   //! Check if user has permission to install the daemon
   /*!
diff --git a/src/lib/arch/unix/ArchDaemonUnix.cpp b/src/lib/arch/unix/ArchDaemonUnix.cpp
index 53498acae..95f707aa0 100644
--- a/src/lib/arch/unix/ArchDaemonUnix.cpp
+++ b/src/lib/arch/unix/ArchDaemonUnix.cpp
@@ -44,7 +44,7 @@ bool alreadyDaemonized()
 
 #endif
 
-int ArchDaemonUnix::daemonize(const char *name, DaemonFunc func)
+int ArchDaemonUnix::daemonize(const char *name, DaemonFunc const &func)
 {
 #ifdef __APPLE__
   if (alreadyDaemonized())
diff --git a/src/lib/arch/unix/ArchDaemonUnix.h b/src/lib/arch/unix/ArchDaemonUnix.h
index 39823102a..5384937ff 100644
--- a/src/lib/arch/unix/ArchDaemonUnix.h
+++ b/src/lib/arch/unix/ArchDaemonUnix.h
@@ -20,5 +20,5 @@ public:
   ~ArchDaemonUnix() override = default;
 
   // IArchDaemon overrides
-  int daemonize(const char *name, DaemonFunc func) override;
+  int daemonize(const char *name, DaemonFunc const &func) override;
 };
diff --git a/src/lib/arch/win32/ArchDaemonWindows.cpp b/src/lib/arch/win32/ArchDaemonWindows.cpp
index 39a7f7336..920a8537c 100644
--- a/src/lib/arch/win32/ArchDaemonWindows.cpp
+++ b/src/lib/arch/win32/ArchDaemonWindows.cpp
@@ -187,7 +187,7 @@ void ArchDaemonWindows::uninstallDaemon(const char *name)
   }
 }
 
-int ArchDaemonWindows::daemonize(const char *name, DaemonFunc func)
+int ArchDaemonWindows::daemonize(const char *name, DaemonFunc const &func)
 {
   assert(name != nullptr);
   assert(func != nullptr);
diff --git a/src/lib/arch/win32/ArchDaemonWindows.h b/src/lib/arch/win32/ArchDaemonWindows.h
index 6cdc36ebc..81da0ad07 100644
--- a/src/lib/arch/win32/ArchDaemonWindows.h
+++ b/src/lib/arch/win32/ArchDaemonWindows.h
@@ -74,7 +74,7 @@ public:
   void uninstallDaemon(const char *name) override;
   void installDaemon() override;
   void uninstallDaemon() override;
-  int daemonize(const char *name, DaemonFunc func) override;
+  int daemonize(const char *name, DaemonFunc const &func) override;
   bool canInstallDaemon(const char *name) override;
   bool isDaemonInstalled(const char *name) override;
   std::string commandLine() const