diff --git a/data/helpers.d/print b/data/helpers.d/print
index fcf7f1ea8..468c41e96 100644
--- a/data/helpers.d/print
+++ b/data/helpers.d/print
@@ -192,6 +192,7 @@ ynh_print_ON () {
 # | arg: -m, --message= - The text to print
 # | arg: -w, --weight=  - The weight for this progression. This value is 1 by default. Use a bigger value for a longer part of the script.
 # | arg: -t, --time=    - Print the execution time since the last call to this helper. Especially usefull to define weights.
+# The execution time is given for the duration since the previous call. So the weight should be applied to this previous call.
 # | arg: -l, --last=    - Use for the last call of the helper, to fill te progression bar.
 #
 # Requires YunoHost version 3.?.? or higher.