diff --git a/CMakeLists.txt b/CMakeLists.txt
index aa4a2e28f..c11a9f71d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -128,7 +128,7 @@ OCV_OPTION(WITH_1394           "Include IEEE1394 support"                    ON
 OCV_OPTION(WITH_AVFOUNDATION   "Use AVFoundation for Video I/O"              ON   IF IOS)
 OCV_OPTION(WITH_CARBON         "Use Carbon for UI instead of Cocoa"          OFF  IF APPLE )
 OCV_OPTION(WITH_CUDA           "Include NVidia Cuda Runtime support"         ON   IF (CMAKE_VERSION VERSION_GREATER "2.8" AND NOT IOS) )
-OCV_OPTION(WITH_VTK            "Include VTK library support (and build opencv_viz module eiher)"             ON  IF (NOT ANDROID AND NOT IOS) )
+OCV_OPTION(WITH_VTK            "Include VTK library support (and build opencv_viz module eiher)"             OFF IF (NOT ANDROID AND NOT IOS) )
 OCV_OPTION(WITH_CUFFT          "Include NVidia Cuda Fast Fourier Transform (FFT) library support"            ON  IF (CMAKE_VERSION VERSION_GREATER "2.8" AND NOT IOS) )
 OCV_OPTION(WITH_CUBLAS         "Include NVidia Cuda Basic Linear Algebra Subprograms (BLAS) library support" OFF IF (CMAKE_VERSION VERSION_GREATER "2.8" AND NOT IOS) )
 OCV_OPTION(WITH_NVCUVID        "Include NVidia Video Decoding library support"                               OFF IF (CMAKE_VERSION VERSION_GREATER "2.8" AND NOT ANDROID AND NOT IOS AND NOT APPLE) )
diff --git a/modules/viz/include/opencv2/viz/vizcore.hpp b/modules/viz/include/opencv2/viz/vizcore.hpp
index bf44a2c03..0fde95b2f 100644
--- a/modules/viz/include/opencv2/viz/vizcore.hpp
+++ b/modules/viz/include/opencv2/viz/vizcore.hpp
@@ -43,8 +43,8 @@
 //
 //M*/
 
-#ifndef __OPENCV_VIZ_HPP__
-#define __OPENCV_VIZ_HPP__
+#ifndef __OPENCV_VIZCORE_HPP__
+#define __OPENCV_VIZCORE_HPP__
 
 #include <opencv2/viz/types.hpp>
 #include <opencv2/viz/widgets.hpp>
@@ -124,4 +124,4 @@ namespace cv
     } /* namespace viz */
 } /* namespace cv */
 
-#endif /* __OPENCV_VIZ_HPP__ */
+#endif /* __OPENCV_VIZCORE_HPP__ */
diff --git a/modules/viz/src/vizimpl.hpp b/modules/viz/src/vizimpl.hpp
index 9eb918af6..02675e0a5 100644
--- a/modules/viz/src/vizimpl.hpp
+++ b/modules/viz/src/vizimpl.hpp
@@ -55,7 +55,7 @@ public:
     int ref_counter;
 
     VizImpl(const String &name);
-    virtual ~VizImpl() {};
+    virtual ~VizImpl() {}
 
     bool wasStopped() const;
     void close();