diff --git a/Geo/GModel.cpp b/Geo/GModel.cpp
index fee9c0864eafe6a11eb755178f4fd2deaf17e351..c52b708871c0d1171229d2f33565bf6ced71c77d 100644
--- a/Geo/GModel.cpp
+++ b/Geo/GModel.cpp
@@ -1507,7 +1507,7 @@ void GModel::checkMeshCoherence(double tolerance)
     int num = 0;
     for(unsigned int i = 0; i < vertices.size(); i++)
       if(!vertices[i]->getIndex()){
-        Msg::Info("Duplicate vertex at (%.16g,%.16g,%.16g)",
+        Msg::Info("Duplicate vertex %d at (%.16g,%.16g,%.16g)", vertices[i]->getNum(),
                   vertices[i]->x(), vertices[i]->y(), vertices[i]->z());
         num++;
       }