diff --git a/ch09-errors.asciidoc b/ch09-errors.asciidoc
index fee8a6e..95908ba 100644
--- a/ch09-errors.asciidoc
+++ b/ch09-errors.asciidoc
@@ -25,7 +25,7 @@ Here is some sample output.
 {error,badarith}
 5> stats:stdv([]).
 {error,badarith}
---------
+-------
 
 <<SOLUTION09-ET01,See a suggested solution in Appendix A.>>