diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 17a64d45..9bde1832 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -105,5 +105,5 @@ if (conditional)
   * We don't use GSL.
   * Don't throw exceptions.
   * Stick to smart pointers. For interfacing with C Win32 API and raw buffers, use `unique_plain_ptr`.
-  * Writing in C is also completely acceptable.
+  * Writing in C is also completely acceptable but prefer to use RAII patterns.
 * Other than that, there are no strict rules for code formatting, but please attempt to emulate the style around the code you are modifying.