Add "explicit" keyword.

diff --git a/include/simgrid/s4u/VirtualMachine.hpp b/include/simgrid/s4u/VirtualMachine.hpp
index 841e2f3..7fb4816 100644 (file)
--- a/include/simgrid/s4u/VirtualMachine.hpp
+++ b/include/simgrid/s4u/VirtualMachine.hpp
@@ -48,7 +48,7 @@ class XBT_PUBLIC VirtualMachine : public s4u::Host {
 #ifndef DOXYGEN
   friend kernel::resource::VirtualMachineImpl; // calls signals from Impl
   friend kernel::resource::HostImpl;           // call private constructor
-  VirtualMachine(kernel::resource::VirtualMachineImpl* impl);
+  explicit VirtualMachine(kernel::resource::VirtualMachineImpl* impl);
 #endif
 
 public: