diff --git a/CHANGES b/CHANGES
index c7ca12608bc..84ed534cce7 100644
--- a/CHANGES
+++ b/CHANGES
@@ -33,6 +33,7 @@ Bugs fixed
   with Python 3.10
 * #9878: mathjax: MathJax configuration is placed after loading MathJax itself
 * #9857: Generated RFC links use outdated base url
+* #9909: HTML, prevent line-wrapping in literal text.
 
 Testing
 --------
diff --git a/sphinx/themes/basic/static/basic.css_t b/sphinx/themes/basic/static/basic.css_t
index 43e04bd3411..2dff556b452 100644
--- a/sphinx/themes/basic/static/basic.css_t
+++ b/sphinx/themes/basic/static/basic.css_t
@@ -757,6 +757,7 @@ span.pre {
     -ms-hyphens: none;
     -webkit-hyphens: none;
     hyphens: none;
+    white-space: nowrap;
 }
 
 div[class*="highlight-"] {