diff --git a/lemon/smart_graph.h b/lemon/smart_graph.h
--- a/lemon/smart_graph.h
+++ b/lemon/smart_graph.h
@@ -365,7 +365,7 @@
       ///Constructor that immediately makes a snapshot
 
       ///This constructor immediately makes a snapshot of the digraph.
-      ///\param _g The digraph we make a snapshot of.
+      ///\param graph The digraph we make a snapshot of.
       Snapshot(SmartDigraph &graph) : _graph(&graph) {
         node_num=_graph->nodes.size();
         arc_num=_graph->arcs.size();
@@ -377,7 +377,7 @@
       ///
       ///This function can be called more than once. In case of a repeated
       ///call, the previous snapshot gets lost.
-      ///\param _g The digraph we make the snapshot of.
+      ///\param graph The digraph we make the snapshot of.
       void save(SmartDigraph &graph)
       {
         _graph=&graph;
@@ -775,7 +775,7 @@
       ///Constructor that immediately makes a snapshot
 
       ///This constructor immediately makes a snapshot of the digraph.
-      ///\param g The digraph we make a snapshot of.
+      ///\param graph The digraph we make a snapshot of.
       Snapshot(SmartGraph &graph) {
         graph.saveSnapshot(*this);
       }
@@ -786,7 +786,7 @@
       ///
       ///This function can be called more than once. In case of a repeated
       ///call, the previous snapshot gets lost.
-      ///\param g The digraph we make the snapshot of.
+      ///\param graph The digraph we make the snapshot of.
       void save(SmartGraph &graph)
       {
         graph.saveSnapshot(*this);