diff --git a/crates/ruma-common/src/canonical_json.rs b/crates/ruma-common/src/canonical_json.rs
index 1529c6ef..96aba87f 100644
--- a/crates/ruma-common/src/canonical_json.rs
+++ b/crates/ruma-common/src/canonical_json.rs
@@ -138,12 +138,11 @@ pub fn to_canonical_value<T: Serialize>(
 /// * `object` contains a field called `signatures` that is not a JSON object.
 /// * `object` is missing the `type` field or the field is not a JSON string.
 pub fn redact(
-    object: &CanonicalJsonObject,
+    mut object: CanonicalJsonObject,
     version: &RoomVersionId,
 ) -> Result<CanonicalJsonObject, RedactionError> {
-    let mut val = object.clone();
-    redact_in_place(&mut val, version)?;
-    Ok(val)
+    redact_in_place(&mut object, version)?;
+    Ok(object)
 }
 
 /// Redacts an event using the rules specified in the Matrix client-server specification.
diff --git a/crates/ruma-signatures/src/functions.rs b/crates/ruma-signatures/src/functions.rs
index 7e04c5a8..2f57305a 100644
--- a/crates/ruma-signatures/src/functions.rs
+++ b/crates/ruma-signatures/src/functions.rs
@@ -321,7 +321,7 @@ pub fn reference_hash(
     value: &CanonicalJsonObject,
     version: &RoomVersionId,
 ) -> Result<String, Error> {
-    let redacted_value = redact(value, version)?;
+    let redacted_value = redact(value.clone(), version)?;
 
     let json =
         canonical_json_with_fields_to_remove(&redacted_value, REFERENCE_HASH_FIELDS_TO_REMOVE)?;
@@ -458,7 +458,7 @@ where
         _ => return Err(JsonError::not_of_type("hashes", JsonType::Object)),
     };
 
-    let mut redacted = redact(object, version)?;
+    let mut redacted = redact(object.clone(), version)?;
 
     sign_json(entity_id, key_pair, &mut redacted)?;
 
@@ -539,7 +539,7 @@ pub fn verify_event(
     object: &CanonicalJsonObject,
     version: &RoomVersionId,
 ) -> Result<Verified, Error> {
-    let redacted = redact(object, version)?;
+    let redacted = redact(object.clone(), version)?;
 
     let hash = match object.get("hashes") {
         Some(hashes_value) => match hashes_value {