diff --git a/src/libsync/clientsideencryption.cpp b/src/libsync/clientsideencryption.cpp
index 7675ad6fa9be1..ba34300420a16 100644
--- a/src/libsync/clientsideencryption.cpp
+++ b/src/libsync/clientsideencryption.cpp
@@ -1115,7 +1115,7 @@ void ClientSideEncryption::writeCertificate(const AccountPtr &account)
     job->start();
 }
 
-void ClientSideEncryption::writeCertificate(const AccountPtr &account, const QString &userId, const QSslCertificate certificate)
+void ClientSideEncryption::writeCertificate(const AccountPtr &account, const QString &userId, const QSslCertificate &certificate)
 {
     const auto keyChainKey = AbstractCredentials::keychainKey(account->url().toString(), userId + e2e_cert + e2e_cert_sharing, userId);
 
diff --git a/src/libsync/clientsideencryption.h b/src/libsync/clientsideencryption.h
index 339ce49b6cbfa..be9ba70248498 100644
--- a/src/libsync/clientsideencryption.h
+++ b/src/libsync/clientsideencryption.h
@@ -155,7 +155,7 @@ public slots:
     void forgetSensitiveData(const OCC::AccountPtr &account);
     void getUsersPublicKeyFromServer(const AccountPtr &account, const QStringList &userIds);
     void fetchCertificateFromKeyChain(const OCC::AccountPtr &account, const QString &userId);
-    void writeCertificate(const AccountPtr &account, const QString &userId, const QSslCertificate certificate);
+    void writeCertificate(const AccountPtr &account, const QString &userId, const QSslCertificate &certificate);
 
 private slots:
     void generateKeyPair(const OCC::AccountPtr &account);