diff --git a/Trajectories/draw_segments.py b/Trajectories/draw_segments.py
index ce81dad0a164410f30c3df1ffa4a5d3a9e4ea4ff..302e4b8d67386c64fa48c2e4365be14e000a0849 100755
--- a/Trajectories/draw_segments.py
+++ b/Trajectories/draw_segments.py
@@ -6,7 +6,8 @@ created Graphviz graph is labeled with the segment-identifying number
 followed by the date index in parentheses. If the graph has cost
 values then the edges are labeled with them. If the option -t is given
 then the label of each node also tells which trajectory the segment
-belongs to.
+belongs to. The script can also process a graph of instantaneous
+eddies.
 
 """