diff --git a/manual/preamble.tex b/manual/preamble.tex
index 4fc5f2be10..217347f63b 100644
--- a/manual/preamble.tex
+++ b/manual/preamble.tex
@@ -33,6 +33,7 @@
 \usepackage{multirow}
 \usepackage{multicol}
 
+\usepackage{scrhack}
 \usepackage{float}
 \floatstyle{ruled}