diff --git a/src/c_arc.rs b/src/c_arc.rs
index e30083780..32e21d4e4 100644
--- a/src/c_arc.rs
+++ b/src/c_arc.rs
@@ -1,3 +1,5 @@
+#![deny(unsafe_op_in_unsafe_fn)]
+
 use crate::src::c_box::CBox;
 use crate::src::error::Rav1dResult;
 use std::marker::PhantomData;