diff --git a/fig-poly-red.tex b/fig-poly-red.tex
index b449039..60533df 100644
--- a/fig-poly-red.tex
+++ b/fig-poly-red.tex
@@ -32,6 +32,7 @@
   \begin{scope}[xshift=4.7cm]
     \draw (1,-1) rectangle (5.5, 1);
     \node[anchor=north west] at (1,1) {Algorithm for $A$};
+    \node[anchor=south east] at (5.5, -1) {\textit{also called} the ``reduction''};
     \node[draw, rectangle, anchor=west] (fbox) at (1.3,0) {$f$};
     \node[draw, rectangle, anchor=west] (bbox) at (2.3,0) {Algorithm for $B$};
     \draw[->, thick] (.5, 0) -- (fbox) -- (bbox) -- (6, 0);