diff --git a/docs/_static/custom.css b/docs/_static/custom.css
index 20c0aa939..736c50e63 100644
--- a/docs/_static/custom.css
+++ b/docs/_static/custom.css
@@ -257,6 +257,12 @@ a:hover {
 /*  white-space: nowrap;*/
 /*}*/
 
+/* Fix title in sticky header on mobile */
+.header-article-item-chapter-title {
+  overflow-y: hidden;
+  max-height: 100%;
+}
+
 /*!* submenu *!*/
 /*.bd-toc {*/
 /*  box-shadow: 0 .2rem .5rem rgba(0, 0, 0, .05), 0 0 .0625rem rgba(0, 0, 0, .1);*/