diff --git a/src/Mod/MeshPart/App/MeshAlgos.cpp b/src/Mod/MeshPart/App/MeshAlgos.cpp
index 11c608cad9..f812be8d21 100644
--- a/src/Mod/MeshPart/App/MeshAlgos.cpp
+++ b/src/Mod/MeshPart/App/MeshAlgos.cpp
@@ -476,8 +476,7 @@ class _VertexCompare
         return clP1.X() < clP2.X();
     }
 
-    _VertexCompare () : dE(1.0e-5) {}
-    double dE;
+    double dE = 1.0e-5;
 };
 
 
diff --git a/src/Mod/MeshPart/App/Mesher.cpp b/src/Mod/MeshPart/App/Mesher.cpp
index 11b8407c1e..ed023917d0 100644
--- a/src/Mod/MeshPart/App/Mesher.cpp
+++ b/src/Mod/MeshPart/App/Mesher.cpp
@@ -127,11 +127,11 @@ namespace MeshPart {
 struct Vertex {
     static const double deflection;
     Standard_Real x,y,z;
-    Standard_Integer i;
+    Standard_Integer i = 0;
     mutable MeshCore::MeshPoint p;
 
     Vertex(Standard_Real X, Standard_Real Y, Standard_Real Z)
-        : x(X),y(Y),z(Z),i(0)
+        : x(X),y(Y),z(Z)
     {
         p.x = static_cast<float>(x);
         p.y = static_cast<float>(y);
@@ -306,26 +306,6 @@ public:
 
 Mesher::Mesher(const TopoDS_Shape& s)
   : shape(s)
-  , method(None)
-  , maxLength(0)
-  , maxArea(0)
-  , localLength(0)
-  , deflection(0)
-  , angularDeflection(0.5)
-  , minLen(0)
-  , maxLen(0)
-  , relative(false)
-  , regular(false)
-  , segments(false)
-#if defined (HAVE_NETGEN)
-  , fineness(5)
-  , growthRate(0)
-  , nbSegPerEdge(0)
-  , nbSegPerRadius(0)
-  , secondOrder(false)
-  , optimize(true)
-  , allowquad(false)
-#endif
 {
 }
 
diff --git a/src/Mod/MeshPart/App/Mesher.h b/src/Mod/MeshPart/App/Mesher.h
index a200846a17..6cb979260a 100644
--- a/src/Mod/MeshPart/App/Mesher.h
+++ b/src/Mod/MeshPart/App/Mesher.h
@@ -142,24 +142,24 @@ private:
 
 private:
     const TopoDS_Shape& shape;
-    Method method;
-    double maxLength;
-    double maxArea;
-    double localLength;
-    double deflection;
-    double angularDeflection;
-    double minLen, maxLen;
-    bool relative;
-    bool regular;
-    bool segments;
+    Method method{None};
+    double maxLength{0};
+    double maxArea{0};
+    double localLength{0};
+    double deflection{0};
+    double angularDeflection{0.5};
+    double minLen{0}, maxLen{0};
+    bool relative{false};
+    bool regular{false};
+    bool segments{false};
 #if defined (HAVE_NETGEN)
-    int fineness;
-    double growthRate;
-    double nbSegPerEdge;
-    double nbSegPerRadius;
-    bool secondOrder;
-    bool optimize;
-    bool allowquad;
+    int fineness{5};
+    double growthRate{0};
+    double nbSegPerEdge{0};
+    double nbSegPerRadius{0};
+    bool secondOrder{false};
+    bool optimize{true};
+    bool allowquad{false};
 #endif
     std::vector<uint32_t> colors;
 
diff --git a/src/Mod/MeshPart/Gui/CurveOnMesh.cpp b/src/Mod/MeshPart/Gui/CurveOnMesh.cpp
index b8d5be943e..be26d5474e 100644
--- a/src/Mod/MeshPart/Gui/CurveOnMesh.cpp
+++ b/src/Mod/MeshPart/Gui/CurveOnMesh.cpp
@@ -241,14 +241,7 @@ public:
         }
     };
     Private()
-        : wireClosed(false)
-        , distance(1.0)
-        , cosAngle(0.7071) // 45 degree
-        , approximate(true)
-        , curve(new ViewProviderCurveOnMesh)
-        , mesh(nullptr)
-        , grid(nullptr)
-        , viewer(nullptr)
+        : curve(new ViewProviderCurveOnMesh)
         , editcursor(QPixmap(cursor_curveonmesh), 7, 7)
     {
     }
@@ -322,13 +315,13 @@ public:
 
     std::vector<PickedPoint> pickedPoints;
     std::list<std::vector<Base::Vector3f> > cutLines;
-    bool wireClosed;
-    double distance;
-    double cosAngle;
-    bool approximate;
+    bool wireClosed{false};
+    double distance{1};
+    double cosAngle{0.7071}; // 45 degree
+    bool approximate{true};
     ViewProviderCurveOnMesh* curve;
-    Gui::ViewProviderDocumentObject* mesh;
-    MeshCore::MeshFacetGrid* grid;
+    Gui::ViewProviderDocumentObject* mesh{0};
+    MeshCore::MeshFacetGrid* grid{nullptr};
     MeshCore::MeshKernel kernel;
     QPointer<Gui::View3DInventor> viewer;
     QCursor editcursor;