diff --git a/rs-matter/src/cert/mod.rs b/rs-matter/src/cert/mod.rs
index 0bbf00fe..fb23f1a2 100644
--- a/rs-matter/src/cert/mod.rs
+++ b/rs-matter/src/cert/mod.rs
@@ -805,14 +805,14 @@ impl<'a> CertVerifier<'a> {
         let asn1 = &asn1[..len];
 
         let k = KeyPair::new_from_public(parent.get_pubkey())?;
-        k.verify_msg(asn1, self.cert.get_signature()).map_err(|e| {
-            error!(
-                "Error in signature verification of certificate: {:x?} by {:x?}",
-                self.cert.get_subject_key_id(),
-                parent.get_subject_key_id()
-            );
-            e
-        })?;
+        k.verify_msg(asn1, self.cert.get_signature())
+            .inspect_err(|e| {
+                error!(
+                    "Error {e} in signature verification of certificate: {:x?} by {:x?}",
+                    self.cert.get_subject_key_id(),
+                    parent.get_subject_key_id()
+                );
+            })?;
 
         // TODO: other validation checks
         Ok(CertVerifier::new(parent))
diff --git a/rs-matter/src/mdns/proto.rs b/rs-matter/src/mdns/proto.rs
index 2ba952dd..dbe3794f 100644
--- a/rs-matter/src/mdns/proto.rs
+++ b/rs-matter/src/mdns/proto.rs
@@ -586,7 +586,7 @@ impl<'a> Service<'a> {
             for (k, v) in self.txt_kvs {
                 octets.append_slice(&[(k.len() + v.len() + 1) as u8])?;
                 octets.append_slice(k.as_bytes())?;
-                octets.append_slice(&[b'='])?;
+                octets.append_slice(b"=")?;
                 octets.append_slice(v.as_bytes())?;
             }