diff --git a/src/libsync/clientsideencryption.cpp b/src/libsync/clientsideencryption.cpp
index 32d489716..73e5e9479 100644
--- a/src/libsync/clientsideencryption.cpp
+++ b/src/libsync/clientsideencryption.cpp
@@ -1256,7 +1256,8 @@ bool ClientSideEncryption::isFolderEncrypted(const QString& path) {
   return (*it);
 }
 
-FileEncryptionJob::FileEncryptionJob(QByteArray &key, QByteArray &iv, QFile *input, QFile *output, QObject *parent)
+FileEncryptionJob::FileEncryptionJob(const QByteArray &key, const QByteArray &iv,
+                                     QPointer<QFile> input, QPointer<QFile> output, QObject *parent)
     : QObject(parent),
       _key(key),
       _iv(iv),
diff --git a/src/libsync/clientsideencryption.h b/src/libsync/clientsideencryption.h
index 5246f9f92..e5753a009 100644
--- a/src/libsync/clientsideencryption.h
+++ b/src/libsync/clientsideencryption.h
@@ -125,7 +125,8 @@ class FileEncryptionJob : public QObject
 {
     Q_OBJECT
 public:
-    FileEncryptionJob(QByteArray &key, QByteArray &iv, QFile *input, QFile *output, QObject *parent = 0);
+    FileEncryptionJob(const QByteArray &key, const QByteArray &iv,
+                      QPointer<QFile> input, QPointer<QFile> output, QObject *parent = 0);
 
 public slots:
     void start();