diff --git a/templates/style/_navbar.scss b/templates/style/_navbar.scss
index 843bdb8a9..ef8aa6100 100644
--- a/templates/style/_navbar.scss
+++ b/templates/style/_navbar.scss
@@ -28,6 +28,12 @@ div.nav-container {
     color: var(--color-navbar-standard);
     /* The font size must be specified in pixels because the height is specified in pixels. */
     font: 16px $font-family-sans;
+    /* In some unusual situations, like a locally installed copy of "Fira Sans," elements
+       of the navbar might overflow vertically and start interfering with the main body
+       content. To ensure that doesn't happen, hide any vertical overflow.
+       See https://github.com/rust-lang/docs.rs/issues/1669.
+       */
+    overflow-y: hidden;
 
     li {
         border-left: 1px solid var(--color-border);