diff --git a/CHANGES b/CHANGES
index aa8cefcbcc6..a8afe6b868c 100644
--- a/CHANGES
+++ b/CHANGES
@@ -80,6 +80,9 @@ Bugs fixed
 * #11473: Type annotations containing :py:data:`~typing.Literal` enumeration
   values now render correctly.
   Patch by Bénédikt Tran.
+* #11594: HTML Theme: Enhancements to horizontal scrolling on smaller
+  devices in the ``agogo`` theme.
+  Patch by Lukas Engelter.
 
 Testing
 -------
diff --git a/sphinx/themes/agogo/static/agogo.css_t b/sphinx/themes/agogo/static/agogo.css_t
index e41dfb8f0a5..48457b34ec7 100644
--- a/sphinx/themes/agogo/static/agogo.css_t
+++ b/sphinx/themes/agogo/static/agogo.css_t
@@ -19,6 +19,10 @@ body {
   line-height: 1.4em;
   color: black;
   background-color: {{ theme_bgcolor }};
+
+  /* fix for background colors breaking at horizontal
+    scrolling on smaller devices */
+  min-width: fit-content;
 }