diff --git a/src/keys.rs b/src/keys.rs
index e0029478..bcf3c1ef 100644
--- a/src/keys.rs
+++ b/src/keys.rs
@@ -421,7 +421,7 @@ impl DiversifiedTransmissionKey {
     }
 
     /// $repr_P(self)$
-    pub(crate) fn to_bytes(&self) -> [u8; 32] {
+    pub(crate) fn to_bytes(self) -> [u8; 32] {
         self.0.to_bytes()
     }
 }
diff --git a/src/note/nullifier.rs b/src/note/nullifier.rs
index 2ae51c94..2f87148d 100644
--- a/src/note/nullifier.rs
+++ b/src/note/nullifier.rs
@@ -37,7 +37,7 @@ impl Nullifier {
     }
 
     /// Serialize the nullifier to its canonical byte representation.
-    pub fn to_bytes(&self) -> [u8; 32] {
+    pub fn to_bytes(self) -> [u8; 32] {
         self.0.to_bytes()
     }