diff --git a/doc/src/sgml/stylesheet.css b/doc/src/sgml/stylesheet.css
index 0fd0f01782..60dcc76209 100644
--- a/doc/src/sgml/stylesheet.css
+++ b/doc/src/sgml/stylesheet.css
@@ -94,3 +94,5 @@ PRE.LITERALLAYOUT, .SCREEN, .SYNOPSIS, .PROGRAMLISTING {
 VAR		{ font-family: monospace; font-style: italic; }
 /* Konqueror's standard style for ACRONYM is italic. */
 ACRONYM		{ font-style: inherit; }
+
+.OPTION		{ white-space: nowrap; }