diff --git a/site/assets/scss/_subnav.scss b/site/assets/scss/_subnav.scss
index 8377ff4235e4..8979aa3cd2f7 100644
--- a/site/assets/scss/_subnav.scss
+++ b/site/assets/scss/_subnav.scss
@@ -1,7 +1,7 @@
 .bd-subnavbar {
   // The position and z-index are needed for the dropdown to stay on top of the content
   position: relative;
-  z-index: $zindex-sticky;
+  z-index: $bd-navbar-zindex;
   background-color: rgba($white, .95);
   box-shadow: 0 .5rem 1rem rgba(0, 0, 0, .05), inset 0 -1px 0 rgba(0, 0, 0, .15);
 
diff --git a/site/assets/scss/_variables.scss b/site/assets/scss/_variables.scss
index 110600260c2f..6e1ae2efd0d5 100644
--- a/site/assets/scss/_variables.scss
+++ b/site/assets/scss/_variables.scss
@@ -11,3 +11,6 @@ $bd-warning:       #f0ad4e;
 $bd-danger:        #d9534f;
 $dropdown-active-icon: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'><path fill='#292b2c' d='M2.3 6.73L.6 4.53c-.4-1.04.46-1.4 1.1-.8l1.1 1.4 3.4-3.8c.6-.63 1.6-.27 1.2.7l-4 4.6c-.43.5-.8.4-1.1.1z'/></svg>");
 $sidebar-collapse-icon: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'><path fill='none' stroke='rgba(0,0,0,.5)' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M5 14l6-6-6-6'/></svg>");
+
+// Higher than core's $zindex-tooltip, which is 1070
+$bd-navbar-zindex: 1080;