diff --git a/lemon/euler.h b/lemon/euler.h
--- a/lemon/euler.h
+++ b/lemon/euler.h
@@ -36,7 +36,7 @@
 
   ///Euler tour iterator for digraphs.
 
-  /// \ingroup graph_prop
+  /// \ingroup graph_properties
   ///This iterator provides an Euler tour (Eulerian circuit) of a \e directed
   ///graph (if there exists) and it converts to the \c Arc type of the digraph.
   ///