diff --git a/src/libs/vdxf/dxflib/dl_creationinterface.h b/src/libs/vdxf/dxflib/dl_creationinterface.h
index fa7d0688c..7683d76c6 100644
--- a/src/libs/vdxf/dxflib/dl_creationinterface.h
+++ b/src/libs/vdxf/dxflib/dl_creationinterface.h
@@ -47,9 +47,8 @@
 class DXFLIB_EXPORT DL_CreationInterface
 {
 public:
-    DL_CreationInterface() : extrusion(), attributes()
+    DL_CreationInterface() : extrusion(new DL_Extrusion), attributes()
     {
-        extrusion = new DL_Extrusion;
     }
     virtual ~DL_CreationInterface()
     {
diff --git a/src/libs/vdxf/dxflib/dl_entities.h b/src/libs/vdxf/dxflib/dl_entities.h
index 2e2f01325..84c09b2ed 100644
--- a/src/libs/vdxf/dxflib/dl_entities.h
+++ b/src/libs/vdxf/dxflib/dl_entities.h
@@ -561,7 +561,7 @@ struct DXFLIB_EXPORT DL_SplineData
  */
 struct DXFLIB_EXPORT DL_KnotData
 {
-    DL_KnotData() : k() {}
+    DL_KnotData() : k(0.0) {}
     /**
      * Constructor.
      * Parameters: see member variables.
@@ -1366,7 +1366,7 @@ struct DXFLIB_EXPORT DL_HatchData
     /**
      * Default constructor.
      */
-    DL_HatchData() : numLoops(), solid(), scale(), angle(), pattern(), originX(), originY()
+    DL_HatchData() : numLoops(0), solid(), scale(0.0), angle(0.0), pattern(), originX(0.0), originY(0.0)
     {}
 
     /**
@@ -1415,7 +1415,8 @@ struct DXFLIB_EXPORT DL_HatchLoopData
     /**
      * Default constructor.
      */
-    DL_HatchLoopData() : numEdges() {}
+    DL_HatchLoopData() : numEdges(0)
+    {}
     /**
      * Constructor.
      * Parameters: see member variables.
diff --git a/src/libs/vdxf/dxflib/dl_extrusion.h b/src/libs/vdxf/dxflib/dl_extrusion.h
index 3e6c78b78..0f1ab9790 100644
--- a/src/libs/vdxf/dxflib/dl_extrusion.h
+++ b/src/libs/vdxf/dxflib/dl_extrusion.h
@@ -44,11 +44,9 @@ public:
     /**
      * Default constructor.
      */
-    DL_Extrusion() : direction(), elevation()
+    DL_Extrusion() : direction(new double[3]), elevation(0.0)
     {
-        direction = new double[3];
         setDirection(0.0, 0.0, 1.0);
-        setElevation(0.0);
     }
 
 
@@ -74,9 +72,8 @@ public:
      *                  world coordinate system
      */
     DL_Extrusion(double dx, double dy, double dz, double elevation)
-        : direction(), elevation(elevation)
+        : direction(new double[3]), elevation(elevation)
     {
-        direction = new double[3];
         setDirection(dx, dy, dz);
     }
 
@@ -141,13 +138,14 @@ public:
      */
     DL_Extrusion & operator = (const DL_Extrusion& extru)
     {
-        setDirection(extru.direction[0], extru.direction[1], extru.direction[2]);
-        setElevation(extru.elevation);
-
         if ( &extru == this )
         {
             return *this;
         }
+        setDirection(extru.direction[0], extru.direction[1], extru.direction[2]);
+        setElevation(extru.elevation);
+
+        return *this;
     }
 
 
diff --git a/src/libs/vdxf/dxflib/dl_writer.h b/src/libs/vdxf/dxflib/dl_writer.h
index 85c3ac562..00515fded 100644
--- a/src/libs/vdxf/dxflib/dl_writer.h
+++ b/src/libs/vdxf/dxflib/dl_writer.h
@@ -62,9 +62,8 @@ public:
     /**
      * @param version DXF version. Defaults to DL_VERSION_2002.
      */
-    DL_Writer(DL_Codes::version version) : m_handle(0x30), modelSpaceHandle(0), paperSpaceHandle(0), paperSpace0Handle(0), version()
+    DL_Writer(DL_Codes::version version) : m_handle(0x30), modelSpaceHandle(0), paperSpaceHandle(0), paperSpace0Handle(0), version(version)
     {
-        this->version = version;
     }
 
     virtual ~DL_Writer() {}
diff --git a/src/libs/vdxf/vdxfengine.cpp b/src/libs/vdxf/vdxfengine.cpp
index 1256fe05e..e4701a115 100644
--- a/src/libs/vdxf/vdxfengine.cpp
+++ b/src/libs/vdxf/vdxfengine.cpp
@@ -54,7 +54,7 @@ static inline QPaintEngine::PaintEngineFeatures svgEngineFeatures()
 //---------------------------------------------------------------------------------------------------------------------
 VDxfEngine::VDxfEngine()
     :QPaintEngine(svgEngineFeatures()),
-      size(), resolution(PrintDPI), fileName(), matrix(), dxf(), dw(),
+      size(), resolution(PrintDPI), fileName(), matrix(), dxf(nullptr), dw(nullptr),
       varMeasurement(VarMeasurement::Metric), varInsunits(VarInsunits::Centimeters)
 {
 }