diff --git a/include/Nazara/Core/Thread.hpp b/include/Nazara/Core/Thread.hpp
index c622fd309..9c77d7301 100644
--- a/include/Nazara/Core/Thread.hpp
+++ b/include/Nazara/Core/Thread.hpp
@@ -64,7 +64,7 @@ namespace Nz
 			NAZARA_CORE_API friend std::ostream& operator<<(std::ostream& o, const Id& id);
 
 		private:
-			Id(ThreadImpl* thread);
+			explicit Id(ThreadImpl* thread);
 
 			ThreadImpl* m_id = nullptr;
 	};
diff --git a/src/Nazara/Core/Thread.cpp b/src/Nazara/Core/Thread.cpp
index 8f9f0b5b6..5380188d1 100644
--- a/src/Nazara/Core/Thread.cpp
+++ b/src/Nazara/Core/Thread.cpp
@@ -7,6 +7,7 @@
 #include <Nazara/Core/Error.hpp>
 #include <Nazara/Core/HardwareInfo.hpp>
 #include <Nazara/Core/MovablePtr.hpp>
+#include <ostream>
 
 #if defined(NAZARA_PLATFORM_WINDOWS)
 	#include <Nazara/Core/Win32/ThreadImpl.hpp>