diff --git a/python/core/qgsfeaturesink.sip b/python/core/qgsfeaturesink.sip
index 99e3e2c896b..9699d7598c8 100644
--- a/python/core/qgsfeaturesink.sip
+++ b/python/core/qgsfeaturesink.sip
@@ -74,12 +74,9 @@ class QgsProxyFeatureSink : QgsFeatureSink
  Constructs a new QgsProxyFeatureSink which forwards features onto a destination ``sink``.
 %End
     virtual bool addFeature( QgsFeature &feature );
-
     virtual bool addFeatures( QgsFeatureList &features );
-
     virtual bool addFeatures( QgsFeatureIterator &iterator );
 
-
     QgsFeatureSink *destinationSink();
 %Docstring
  Returns the destination QgsFeatureSink which the proxy will forward features to.
diff --git a/src/core/qgsfeaturesink.cpp b/src/core/qgsfeaturesink.cpp
index cfd1092c836..4f2dc367334 100644
--- a/src/core/qgsfeaturesink.cpp
+++ b/src/core/qgsfeaturesink.cpp
@@ -43,18 +43,3 @@ bool QgsFeatureSink::addFeatures( QgsFeatureIterator &iterator )
 QgsProxyFeatureSink::QgsProxyFeatureSink( QgsFeatureSink *sink )
   : mSink( sink )
 {}
-
-bool QgsProxyFeatureSink::addFeature( QgsFeature &feature )
-{
-  return mSink->addFeature( feature );
-}
-
-bool QgsProxyFeatureSink::addFeatures( QgsFeatureList &features )
-{
-  return mSink->addFeatures( features );
-}
-
-bool QgsProxyFeatureSink::addFeatures( QgsFeatureIterator &iterator )
-{
-  return mSink->addFeatures( iterator );
-}
diff --git a/src/core/qgsfeaturesink.h b/src/core/qgsfeaturesink.h
index a1b47fe310d..809e9bc6cc8 100644
--- a/src/core/qgsfeaturesink.h
+++ b/src/core/qgsfeaturesink.h
@@ -80,9 +80,9 @@ class CORE_EXPORT QgsProxyFeatureSink : public QgsFeatureSink
      * Constructs a new QgsProxyFeatureSink which forwards features onto a destination \a sink.
      */
     QgsProxyFeatureSink( QgsFeatureSink *sink );
-    bool addFeature( QgsFeature &feature ) override;
-    bool addFeatures( QgsFeatureList &features ) override;
-    bool addFeatures( QgsFeatureIterator &iterator ) override;
+    bool addFeature( QgsFeature &feature ) override { return mSink->addFeature( feature ); }
+    bool addFeatures( QgsFeatureList &features ) override { return mSink->addFeatures( features ); }
+    bool addFeatures( QgsFeatureIterator &iterator ) override { return mSink->addFeatures( iterator ); }
 
     /**
      * Returns the destination QgsFeatureSink which the proxy will forward features to.