diff --git a/include/exiv2/matroskavideo.hpp b/include/exiv2/matroskavideo.hpp
index 32123e83..40877298 100644
--- a/include/exiv2/matroskavideo.hpp
+++ b/include/exiv2/matroskavideo.hpp
@@ -115,9 +115,9 @@ class EXIV2API MatroskaVideo : public Image {
   explicit MatroskaVideo(BasicIo::UniquePtr io);
 
   //! Copy constructor
-  MatroskaVideo(const MatroskaVideo& rhs) = delete;
+  MatroskaVideo(const MatroskaVideo&) = delete;
   //! Assignment operator
-  MatroskaVideo& operator=(const MatroskaVideo& rhs) = delete;
+  MatroskaVideo& operator=(const MatroskaVideo&) = delete;
   //@}
 
   //! @name Manipulators
@@ -193,4 +193,4 @@ EXIV2API bool isMkvType(BasicIo& iIo, bool advance);
 
 }  // namespace Exiv2
 
-#endif  // #ifndef MATROSKAVIDEO_HPP_
\ No newline at end of file
+#endif  // #ifndef MATROSKAVIDEO_HPP_
diff --git a/src/matroskavideo.cpp b/src/matroskavideo.cpp
index 68c2fda5..182bd27b 100644
--- a/src/matroskavideo.cpp
+++ b/src/matroskavideo.cpp
@@ -946,7 +946,7 @@ uint32_t MatroskaVideo::findBlockSize(byte b) {
 }
 
 Image::UniquePtr newMkvInstance(BasicIo::UniquePtr io, bool /*create*/) {
-  Image::UniquePtr image(new MatroskaVideo(std::move(io)));
+  auto image = std::make_unique<MatroskaVideo>(std::move(io));
   if (!image->good()) {
     image.reset();
   }
diff --git a/src/quicktimevideo.cpp b/src/quicktimevideo.cpp
index 883e03c6..6ebc249f 100644
--- a/src/quicktimevideo.cpp
+++ b/src/quicktimevideo.cpp
@@ -1574,7 +1574,7 @@ void QuickTimeVideo::aspectRatio() {
 }  // QuickTimeVideo::aspectRatio
 
 Image::UniquePtr newQTimeInstance(BasicIo::UniquePtr io, bool /*create*/) {
-  Image::UniquePtr image(new QuickTimeVideo(std::move(io)));
+  auto image = std::make_unique<QuickTimeVideo>(std::move(io));
   if (!image->good()) {
     image.reset();
   }