diff --git a/manual/plugins/calculator.tex b/manual/plugins/calculator.tex
index 422a13463d..5ff277993f 100644
--- a/manual/plugins/calculator.tex
+++ b/manual/plugins/calculator.tex
@@ -3,8 +3,8 @@
 \screenshot{plugins/images/ss-calculator}{Calculator}{img:calculator}
 
 This is a simple scientific calculator for use on the \dap. It works like a
-standard calculator. Pressing the ``1st'' button will toggle between other
-available maths functions on the right hand side.
+standard calculator. Pressing the ``1st'' and ``2nd'' buttons will toggle between
+ other available math functions.
 
 \begin{table}
 \begin{btnmap}{}{}