diff --git a/src/browser/themes/shared/zen-browser-shared.css b/src/browser/themes/shared/zen-browser-shared.css
index 3d7f2fdf2..3ffa2b255 100644
--- a/src/browser/themes/shared/zen-browser-shared.css
+++ b/src/browser/themes/shared/zen-browser-shared.css
@@ -798,7 +798,7 @@ panelmultiview {
     /* We have the pinned tabs on the top, next to each other,
      * and the rest of the tabs are below them. */
     display: grid;
-    grid-template-columns: repeat(auto-fill, minmax(30px, 1fr));
+    grid-template-columns: repeat(auto-fill, minmax(31px, 1fr));
     padding: 5px;
   }