diff --git a/vignettes/01_First_network.Rmd b/vignettes/01_First_network.Rmd
index 1bb92f6457630c6b0b4f2d405206e6e8dc1e5904..0db5a50e38148a4d90f2d0d88d1bb3a27cbb51d2 100644
--- a/vignettes/01_First_network.Rmd
+++ b/vignettes/01_First_network.Rmd
@@ -30,7 +30,9 @@ Create the ginet object
 
 ```{r}
 # Specify that all nodes are of run-off type
-seine_nodes$runoff = TRUE
+seine_nodes$runoff <- TRUE
+# Convert distance in km as it the unit used by airGR
+seine_nodes$distance_aval <- seine_nodes$distance_aval / 1000
 # Generate the ginet object
 ginet <- Ginet(seine_nodes, list(id = "id_sgl", down = "id_aval", length = "distance_aval"))
 ```