diff --git a/python/core/geometry/qgsabstractgeometryv2.sip b/python/core/geometry/qgsabstractgeometryv2.sip
index 4e5e62cfd116..226442306d88 100644
--- a/python/core/geometry/qgsabstractgeometryv2.sip
+++ b/python/core/geometry/qgsabstractgeometryv2.sip
@@ -310,7 +310,7 @@ class QgsAbstractGeometryV2
         E.g. QgsLineString -> QgsCompoundCurve, QgsPolygonV2 -> QgsCurvePolygon,
         QgsMultiLineString -> QgsMultiCurve, QgsMultiPolygonV2 -> QgsMultiSurface
         @return the converted geometry. Caller takes ownership*/
-    virtual QgsAbstractGeometry* toCurveType() const /Factory/;
+    virtual QgsAbstractGeometryV2* toCurveType() const /Factory/;
 
     /** Returns approximate angle at a vertex. This is usually the average angle between adjacent
      * segments, and can be pictured as the orientation of a line following the curvature of the
diff --git a/python/core/geometry/qgslinestringv2.sip b/python/core/geometry/qgslinestringv2.sip
index a74d9ec64f78..319a811bd346 100644
--- a/python/core/geometry/qgslinestringv2.sip
+++ b/python/core/geometry/qgslinestringv2.sip
@@ -104,7 +104,7 @@ class QgsLineStringV2: public QgsCurveV2
 
     /** Returns the geometry converted to the more generic curve type QgsCompoundCurve
     @return the converted geometry. Caller takes ownership*/
-    QgsAbstractGeometry* toCurveType() const /Factory/;
+    QgsAbstractGeometryV2* toCurveType() const /Factory/;
 
     /** Returns a QPolygonF representing the line string.
      */
diff --git a/python/core/geometry/qgsmultilinestringv2.sip b/python/core/geometry/qgsmultilinestringv2.sip
index 964524de357e..a3853cc10575 100644
--- a/python/core/geometry/qgsmultilinestringv2.sip
+++ b/python/core/geometry/qgsmultilinestringv2.sip
@@ -22,7 +22,7 @@ class QgsMultiLineStringV2: public QgsMultiCurveV2
 
     /** Returns the geometry converted to the more generic curve type QgsMultiCurve
         @return the converted geometry. Caller takes ownership*/
-    QgsAbstractGeometry* toCurveType() const /Factory/;
+    QgsAbstractGeometryV2* toCurveType() const /Factory/;
 
   protected:
 
diff --git a/python/core/geometry/qgsmultipolygonv2.sip b/python/core/geometry/qgsmultipolygonv2.sip
index f01f785e75d2..66d080f29248 100644
--- a/python/core/geometry/qgsmultipolygonv2.sip
+++ b/python/core/geometry/qgsmultipolygonv2.sip
@@ -22,7 +22,7 @@ class QgsMultiPolygonV2: public QgsMultiSurfaceV2
 
     /** Returns the geometry converted to the more generic curve type QgsMultiSurface
         @return the converted geometry. Caller takes ownership*/
-    QgsAbstractGeometry* toCurveType() const /Factory/;
+    QgsAbstractGeometryV2* toCurveType() const /Factory/;
 
   protected:
 
diff --git a/python/core/geometry/qgspolygonv2.sip b/python/core/geometry/qgspolygonv2.sip
index 8824c93ea473..7416804bdb55 100644
--- a/python/core/geometry/qgspolygonv2.sip
+++ b/python/core/geometry/qgspolygonv2.sip
@@ -28,7 +28,7 @@ class QgsPolygonV2: public QgsCurvePolygonV2
 
     /** Returns the geometry converted to the more generic curve type QgsCurvePolygon
          @return the converted geometry. Caller takes ownership*/
-    QgsAbstractGeometry* toCurveType() const /Factory/;
+    QgsAbstractGeometryV2* toCurveType() const /Factory/;
 
     void addInteriorRing( QgsCurveV2* ring /Transfer/ );
     //overridden to handle LineString25D rings