diff --git a/include/hpp/manipulation/graph/state.hh b/include/hpp/manipulation/graph/state.hh
index 96f166301164e00b340453c5c70e521803d91eec..f5a9e0013886d16bc715ff5e64bfbb997ec0d21f 100644
--- a/include/hpp/manipulation/graph/state.hh
+++ b/include/hpp/manipulation/graph/state.hh
@@ -113,8 +113,10 @@ namespace hpp {
             return hiddenNeighbors_;
           }
 
+          /// Set weight of edge starting from this state.
           void updateWeight (const EdgePtr_t&edge, const Weight_t& w);
 
+          /// Get weight of edge starting from this state.
           Weight_t getWeight (const EdgePtr_t&edge);
 
           /// Constraint to project onto this state.