1 files changed, 4 insertions, 3 deletions
diff --git a/src/Common/Backends/SystemBackendPosix.h b/src/Common/Backends/SystemBackendPosix.h
index 9efd59f..4a2c572 100644
--- a/src/Common/Backends/SystemBackendPosix.h
+++ b/src/Common/Backends/SystemBackendPosix.h
@@ -28,6 +28,7 @@
 
 #include <sys/types.h>
 #include <sigc++/signal.h>
+#include <sigc++/hide.h>
 
 namespace Mad {
 namespace Common {
@@ -47,8 +48,8 @@ class SystemBackendPosix : public SystemBackend {
     }
 
   protected:
-    virtual bool doShutdown() {return exec(sigc::slot<void, int>(), "/sbin/halt");}
-    virtual bool doReboot() {return exec(sigc::slot<void, int>(), "/sbin/reboot");}
+    virtual bool doShutdown(const sigc::slot<void> &callback) {return exec(sigc::hide(callback), "/sbin/halt");}
+    virtual bool doReboot(const sigc::slot<void> &callback) {return exec(sigc::hide(callback), "/sbin/reboot");}
 
   public:
     ~SystemBackendPosix();
@@ -61,7 +62,7 @@ class SystemBackendPosix : public SystemBackend {
       SystemBackend::unregisterBackend(&backend);
     }
 
-    static bool exec(sigc::slot<void, int> resultHandler, const std::string &filename, const std::vector<std::string> &argv = std::vector<std::string>(),
+    static bool exec(const sigc::slot<void, int> &resultHandler, const std::string &filename, const std::vector<std::string> &argv = std::vector<std::string>(),
         const std::vector<std::string> &env = std::vector<std::string>());
 };