diff --git a/protobuf/src/coded_input_stream/input_source.rs b/protobuf/src/coded_input_stream/input_source.rs
index 5f364755e..2b9010f7d 100644
--- a/protobuf/src/coded_input_stream/input_source.rs
+++ b/protobuf/src/coded_input_stream/input_source.rs
@@ -7,6 +7,7 @@ use crate::coded_input_stream::buf_read_or_reader::BufReadOrReader;
 #[derive(Debug)]
 pub(crate) enum InputSource<'a> {
     Read(BufReadOrReader<'a>),
+    #[allow(dead_code)] // Keep the field to clarify we logically hold the reference.
     Slice(&'a [u8]),
     #[cfg(feature = "bytes")]
     Bytes(&'a Bytes),
diff --git a/protobuf/src/reflect/oneof/mod.rs b/protobuf/src/reflect/oneof/mod.rs
index 6c33bd9d4..f355ed1ac 100644
--- a/protobuf/src/reflect/oneof/mod.rs
+++ b/protobuf/src/reflect/oneof/mod.rs
@@ -16,6 +16,7 @@ pub struct OneofDescriptor {
 }
 
 pub(crate) enum OneofDescriptorImplRef {
+    #[allow(dead_code)]
     Generated(&'static GeneratedOneofDescriptor),
     Dynamic,
 }