diff --git a/libro-errata-corrige.tex b/libro-errata-corrige.tex
index d3d4937..5db75aa 100644
--- a/libro-errata-corrige.tex
+++ b/libro-errata-corrige.tex
@@ -120,7 +120,7 @@
 \begin{center}
 \begin{circuitikz}
   \draw (0,0)[american voltages]
-  to[battery1=$V$,invert] (0,2)
+  to[battery1, v<=$V$, invert] (0,2)
   to[short, i>=$I$] (2,2)
   to[R=$R$] (2,0)
   to[short] (0,0);