diff --git a/src/core/qgsmaptopixelgeometrysimplifier.cpp b/src/core/qgsmaptopixelgeometrysimplifier.cpp
index 4f57db31952c..4041b690a34a 100644
--- a/src/core/qgsmaptopixelgeometrysimplifier.cpp
+++ b/src/core/qgsmaptopixelgeometrysimplifier.cpp
@@ -162,8 +162,6 @@ std::unique_ptr< QgsAbstractGeometry > QgsMapToPixelSimplifier::simplifyGeometry
     }
 
     double x = 0.0, y = 0.0, lastX = 0.0, lastY = 0.0;
-    QgsRectangle r;
-    r.setMinimal();
 
     if ( numPoints <= ( isaLinearRing ? 4 : 2 ) )
       isGeneralizable = false;
@@ -225,8 +223,6 @@ std::unique_ptr< QgsAbstractGeometry > QgsMapToPixelSimplifier::simplifyGeometry
             lastX = x;
             lastY = y;
           }
-
-          r.combineExtentWith( x, y );
         }
         break;
       }
@@ -300,8 +296,6 @@ std::unique_ptr< QgsAbstractGeometry > QgsMapToPixelSimplifier::simplifyGeometry
 
             hasLongSegments |= isLongSegment;
           }
-
-          r.combineExtentWith( x, y );
         }
       }
     }
@@ -317,7 +311,7 @@ std::unique_ptr< QgsAbstractGeometry > QgsMapToPixelSimplifier::simplifyGeometry
       {
         // approximate the geometry's shape by its bounding box
         // (rect for linear ring / one segment for line string)
-        return generalizeWkbGeometryByBoundingBox( wkbType, geometry, r, isaLinearRing );
+        return generalizeWkbGeometryByBoundingBox( wkbType, geometry, envelope, isaLinearRing );
       }
       else
       {