diff --git a/common/gal/opengl/opengl_gal.cpp b/common/gal/opengl/opengl_gal.cpp
index 6782a1170a..2113894f2e 100644
--- a/common/gal/opengl/opengl_gal.cpp
+++ b/common/gal/opengl/opengl_gal.cpp
@@ -826,11 +826,11 @@ void OPENGL_GAL::DrawPolygon( const SHAPE_POLY_SET& aPolySet )
     for( int j = 0; j < aPolySet.OutlineCount(); ++j )
     {
         const SHAPE_LINE_CHAIN& outline = aPolySet.COutline( j );
-        const int pointCount = outline.PointCount();
+        const int pointCount = outline.SegmentCount() + 1;
         std::unique_ptr<GLdouble[]> points( new GLdouble[3 * pointCount] );
         GLdouble* ptr = points.get();
 
-        for( int i = 0; i < outline.PointCount(); ++i )
+        for( int i = 0; i < pointCount; ++i )
         {
             const VECTOR2I& p = outline.CPoint( i );
             *ptr++ = p.x;