diff --git a/Doxygen/Scripts/arangodb_header.html b/Doxygen/Scripts/arangodb_header.html
index f359039dd1..d7d18be7ba 100644
--- a/Doxygen/Scripts/arangodb_header.html
+++ b/Doxygen/Scripts/arangodb_header.html
@@ -1 +1,7 @@
+<style type="text/css">
+div.line{
+  font-family:monospace;
+  white-space:pre;
+}
+</style>
 <?php include "../include/header.php" ?>