diff --git a/doc/_static/breathe.css b/doc/_static/breathe.css
index 90f94bbdea69..96e5a4976e85 100644
--- a/doc/_static/breathe.css
+++ b/doc/_static/breathe.css
@@ -11,6 +11,6 @@
   display: inline;
 }
 
-.container s.breathe-sectiondef {
+.container .breathe-sectiondef {
   width: inherit;
 }