diff --git a/src/Memory/UniquePtrList.hpp b/src/Memory/UniquePtrList.hpp
index f1d21e0..76f2633 100644
--- a/src/Memory/UniquePtrList.hpp
+++ b/src/Memory/UniquePtrList.hpp
@@ -56,7 +56,7 @@ namespace ArbUt {
         }
 
         inline void Append(ValueT* value) { _vector.push_back(value); }
-        inline BorrowedPtr<ValueT> operator[] (size_t index) const { return At(index); }
+        inline BorrowedPtr<ValueT> operator[](size_t index) const { return At(index); }
 
         inline size_t Count() const { return _vector.size(); }