diff --git a/doc/api_assets/style.css b/doc/api_assets/style.css
index 709a835f814963..d40253e5ae1d4a 100644
--- a/doc/api_assets/style.css
+++ b/doc/api_assets/style.css
@@ -79,6 +79,15 @@ code a:hover {
   color: white !important;
 }
 
+.api_stability_0 a,
+.api_stability_1 a,
+.api_stability_2 a,
+.api_stability_3 a,
+.api_stability_4 a,
+.api_stability_5 a {
+  text-decoration: underline;
+}
+
 .api_stability_0 {
   background-color: #D60027;
 }