diff --git a/Makefile b/Makefile
index 5a7e8d1..81169c9 100644
--- a/Makefile
+++ b/Makefile
@@ -26,7 +26,7 @@ git.chunked: git.chunked-prereq styles/toc.html
 epub: git.epub
 
 git.epub: git.txt
-	a2x -fepub --epubcheck $<
+	a2x -fepub --stylesheet="docbook-xsl.css styles/ebook.css" --epubcheck $<
 
 pdf: git.pdf
 
diff --git a/styles/ebook.css b/styles/ebook.css
new file mode 100644
index 0000000..74e3552
--- /dev/null
+++ b/styles/ebook.css
@@ -0,0 +1,3 @@
+body pre {
+  white-space: pre-wrap;
+}