diff --git a/code/AssetLib/IFC/IFCCurve.cpp b/code/AssetLib/IFC/IFCCurve.cpp
index 9bdf79070..44165befc 100644
--- a/code/AssetLib/IFC/IFCCurve.cpp
+++ b/code/AssetLib/IFC/IFCCurve.cpp
@@ -68,12 +68,12 @@ public:
     }
 
     // --------------------------------------------------
-    bool IsClosed() const {
+    bool IsClosed() const override {
         return true;
     }
 
     // --------------------------------------------------
-    size_t EstimateSampleCount(IfcFloat a, IfcFloat b) const {
+    size_t EstimateSampleCount(IfcFloat a, IfcFloat b) const override {
         ai_assert( InRange( a ) );
         ai_assert( InRange( b ) );
 
@@ -87,7 +87,7 @@ public:
     }
 
     // --------------------------------------------------
-    ParamRange GetParametricRange() const {
+    ParamRange GetParametricRange() const override {
         return std::make_pair(static_cast<IfcFloat>( 0. ), static_cast<IfcFloat>( AI_MATH_TWO_PI / conv.angle_scale ));
     }
 
@@ -107,7 +107,7 @@ public:
     ~Circle() override = default;
     
     // --------------------------------------------------
-    IfcVector3 Eval(IfcFloat u) override const {
+    IfcVector3 Eval(IfcFloat u) const override {
         u = -conv.angle_scale * u;
         return location + static_cast<IfcFloat>(entity.Radius)*(static_cast<IfcFloat>(std::cos(u))*p[0] +
             static_cast<IfcFloat>(std::sin(u))*p[1]);
@@ -130,7 +130,7 @@ public:
     }
 
     // --------------------------------------------------
-    IfcVector3 Eval(IfcFloat u) const {
+    IfcVector3 Eval(IfcFloat u) const override {
         u = -conv.angle_scale * u;
         return location + static_cast<IfcFloat>(entity.SemiAxis1)*static_cast<IfcFloat>(std::cos(u))*p[0] +
             static_cast<IfcFloat>(entity.SemiAxis2)*static_cast<IfcFloat>(std::sin(u))*p[1];
@@ -153,17 +153,17 @@ public:
     }
 
     // --------------------------------------------------
-    bool IsClosed() const {
+    bool IsClosed() const override {
         return false;
     }
 
     // --------------------------------------------------
-    IfcVector3 Eval(IfcFloat u) const {
+    IfcVector3 Eval(IfcFloat u) const override {
         return p + u*v;
     }
 
     // --------------------------------------------------
-    size_t EstimateSampleCount(IfcFloat a, IfcFloat b) const {
+    size_t EstimateSampleCount(IfcFloat a, IfcFloat b) const override {
         ai_assert( InRange( a ) );
         ai_assert( InRange( b ) );
         // two points are always sufficient for a line segment
@@ -172,7 +172,7 @@ public:
 
 
     // --------------------------------------------------
-    void SampleDiscrete(TempMesh& out,IfcFloat a, IfcFloat b) const {
+    void SampleDiscrete(TempMesh& out,IfcFloat a, IfcFloat b) const override {
         ai_assert( InRange( a ) );
         ai_assert( InRange( b ) );
 
@@ -186,7 +186,7 @@ public:
     }
 
     // --------------------------------------------------
-    ParamRange GetParametricRange() const {
+    ParamRange GetParametricRange() const override {
         const IfcFloat inf = std::numeric_limits<IfcFloat>::infinity();
 
         return std::make_pair(-inf,+inf);
@@ -232,7 +232,7 @@ public:
     }
 
     // --------------------------------------------------
-    IfcVector3 Eval(IfcFloat u) const {
+    IfcVector3 Eval(IfcFloat u) const override {
         if (curves.empty()) {
             return IfcVector3();
         }
@@ -252,7 +252,7 @@ public:
     }
 
     // --------------------------------------------------
-    size_t EstimateSampleCount(IfcFloat a, IfcFloat b) const {
+    size_t EstimateSampleCount(IfcFloat a, IfcFloat b) const override {
         ai_assert( InRange( a ) );
         ai_assert( InRange( b ) );
         size_t cnt = 0;
@@ -273,7 +273,7 @@ public:
     }
 
     // --------------------------------------------------
-    void SampleDiscrete(TempMesh& out,IfcFloat a, IfcFloat b) const {
+    void SampleDiscrete(TempMesh& out,IfcFloat a, IfcFloat b) const override {
         ai_assert( InRange( a ) );
         ai_assert( InRange( b ) );
 
@@ -291,7 +291,7 @@ public:
     }
 
     // --------------------------------------------------
-    ParamRange GetParametricRange() const {
+    ParamRange GetParametricRange() const override {
         return std::make_pair(static_cast<IfcFloat>( 0. ),total);
     }
 
@@ -371,27 +371,27 @@ public:
     }
 
     // --------------------------------------------------
-    IfcVector3 Eval(IfcFloat p) const {
+    IfcVector3 Eval(IfcFloat p) const override {
         ai_assert(InRange(p));
         return base->Eval( TrimParam(p) );
     }
 
     // --------------------------------------------------
-    size_t EstimateSampleCount(IfcFloat a, IfcFloat b) const {
+    size_t EstimateSampleCount(IfcFloat a, IfcFloat b) const override {
         ai_assert( InRange( a ) );
         ai_assert( InRange( b ) );
         return base->EstimateSampleCount(TrimParam(a),TrimParam(b));
     }
 
     // --------------------------------------------------
-    void SampleDiscrete(TempMesh& out,IfcFloat a,IfcFloat b) const {
+    void SampleDiscrete(TempMesh& out,IfcFloat a,IfcFloat b) const override {
         ai_assert(InRange(a));
         ai_assert(InRange(b));
         return base->SampleDiscrete(out,TrimParam(a),TrimParam(b));
     }
 
     // --------------------------------------------------
-    ParamRange GetParametricRange() const {
+    ParamRange GetParametricRange() const override {
         return std::make_pair(static_cast<IfcFloat>( 0. ),maxval);
     }
 
@@ -429,7 +429,7 @@ public:
     }
 
     // --------------------------------------------------
-    IfcVector3 Eval(IfcFloat p) const {
+    IfcVector3 Eval(IfcFloat p) const override {
         ai_assert(InRange(p));
 
         const size_t b = static_cast<size_t>(std::floor(p));
@@ -442,14 +442,14 @@ public:
     }
 
     // --------------------------------------------------
-    size_t EstimateSampleCount(IfcFloat a, IfcFloat b) const {
+    size_t EstimateSampleCount(IfcFloat a, IfcFloat b) const override {
         ai_assert(InRange(a));
         ai_assert(InRange(b));
         return static_cast<size_t>( std::ceil(b) - std::floor(a) );
     }
 
     // --------------------------------------------------
-    ParamRange GetParametricRange() const {
+    ParamRange GetParametricRange() const override {
         return std::make_pair(static_cast<IfcFloat>( 0. ),static_cast<IfcFloat>(points.size()-1));
     }
 
@@ -514,7 +514,7 @@ size_t Curve::EstimateSampleCount(IfcFloat a, IfcFloat b) const {
     ai_assert( InRange( a ) );
     ai_assert( InRange( b ) );
 
-    // arbitrary default value, deriving classes should supply better suited values
+    // arbitrary default value, deriving classes should supply better-suited values
     return 16;
 }