diff --git a/src/core/device.h b/src/core/device.h
index 03a57f8..4c24410 100644
--- a/src/core/device.h
+++ b/src/core/device.h
@@ -55,9 +55,9 @@ public:
 
 protected:
     explicit Device(const QString& name, const QString& deviceNode, const qint32 logicalSize, const qint64 totalLogical, const QString& iconName = QString(), Device::Type type = Device::Disk_Device);
-    explicit Device(const Device& other);
 
 public:
+    explicit Device(const Device& other);
     virtual ~Device();
 
 public: