diff --git a/fuzz/fuzz_targets/fuzz_decode.rs b/fuzz/fuzz_targets/fuzz_decode.rs
index 53be2cd..e53ea9d 100644
--- a/fuzz/fuzz_targets/fuzz_decode.rs
+++ b/fuzz/fuzz_targets/fuzz_decode.rs
@@ -1,4 +1,5 @@
 #![no_main]
+#[warn(unused_variables)]
 
 use libfuzzer_sys::fuzz_target;
 use dhcproto::v4::{Message, Decoder, Decodable};