diff --git a/esds/plugins/power_states.py b/esds/plugins/power_states.py
index c9357c7..880c2d1 100644
--- a/esds/plugins/power_states.py
+++ b/esds/plugins/power_states.py
@@ -26,7 +26,7 @@ from .node_plugin import NodePlugin
 
 # #Regarding PowerStatesFromFile:
 # #Format of <file> is one <entry> per line that follow this format <state-0>:<state-1>:...:<state-n>
-# #Each line can corresponds to one node
+# #Each line can corresponds to one node (line 0 for node 0 etc..)
 # import Powerstates as ps
 # pstates=ps.PowerStatesFromFile(<node>,<file>,<entry-line>) # Create a power states on node <node> using line <entry-line> of file <file>
 # pstates.set_state(<id>) # Switch to the <id> power states