diff --git a/README.md b/README.md
index 0689759..49918a8 100644
--- a/README.md
+++ b/README.md
@@ -39,9 +39,11 @@ The available commands are
 
 * `enstrophy`: to compute the enstrophy and various other observables. This
   command prints
-  ```step_index time average(alpha) average(enstrophy) average(alpha*enstrophy) alpha enstrophy alpha*enstrophy```
+  ```step_index time average(alpha) average(energy) average(enstrophy) alpha energy enstrophy```
   where the averages are running averages over `print_freq`. In addition, if
   the algorithm has an adaptive step, an extra column is printed with `delta`.
+  In addition, if alpha has a negative value (even in between `print_freq`
+  intervals), a line is printed with the information.
 
 * `uk`: to compute the Fourier transform of the solution.