diff --git a/include/Nazara/Core/ObjectRef.hpp b/include/Nazara/Core/ObjectRef.hpp
index d1cd13ec0..6a69a22ee 100644
--- a/include/Nazara/Core/ObjectRef.hpp
+++ b/include/Nazara/Core/ObjectRef.hpp
@@ -56,7 +56,7 @@ namespace Nz
 	template<typename T> bool operator<(const T& lhs, const ObjectRef<T>& rhs);
 	template<typename T> bool operator<(const ObjectRef<T>& lhs, const T& rhs);
 
-	template<typename T> bool operator<=(const ObjectRef<T>, const ObjectRef<T>& rhs);
+	template<typename T> bool operator<=(const ObjectRef<T>& lhs, const ObjectRef<T>& rhs);
 	template<typename T> bool operator<=(const T& lhs, const ObjectRef<T>& rhs);
 	template<typename T> bool operator<=(const ObjectRef<T>& lhs, const T& rhs);