diff --git a/python/gui/layertree/qgslayertreemapcanvasbridge.sip b/python/gui/layertree/qgslayertreemapcanvasbridge.sip
index 38d68256c87..56aae405e66 100644
--- a/python/gui/layertree/qgslayertreemapcanvasbridge.sip
+++ b/python/gui/layertree/qgslayertreemapcanvasbridge.sip
@@ -68,6 +68,7 @@ class QgsLayerTreeMapCanvasBridge : QObject
 
     void defaultLayerOrder( QgsLayerTreeNode* node, QStringList& order ) const;
 
+    //! Fill canvasLayers and overviewLayers lists from node and its descendants
     void setCanvasLayers( QgsLayerTreeNode* node, QList<QgsMapLayer*> &canvasLayers, QList<QgsMapLayer*>& overviewLayers );
 
     void deferredSetCanvasLayers();
diff --git a/src/gui/layertree/qgslayertreemapcanvasbridge.h b/src/gui/layertree/qgslayertreemapcanvasbridge.h
index 08b33449ab5..b17a1bef2b2 100644
--- a/src/gui/layertree/qgslayertreemapcanvasbridge.h
+++ b/src/gui/layertree/qgslayertreemapcanvasbridge.h
@@ -95,6 +95,7 @@ class GUI_EXPORT QgsLayerTreeMapCanvasBridge : public QObject
 
     void defaultLayerOrder( QgsLayerTreeNode* node, QStringList& order ) const;
 
+    //! Fill canvasLayers and overviewLayers lists from node and its descendants
     void setCanvasLayers( QgsLayerTreeNode* node, QList<QgsMapLayer*> &canvasLayers, QList<QgsMapLayer*>& overviewLayers );
 
     void deferredSetCanvasLayers();