diff --git a/scss/_navbar.scss b/scss/_navbar.scss
index ed49b76b9b..45c1e05d4e 100644
--- a/scss/_navbar.scss
+++ b/scss/_navbar.scss
@@ -97,7 +97,7 @@
 // the default flexbox row orienation. Requires the use of `flex-wrap: wrap`
 // on the `.navbar` parent.
 .navbar-collapse {
-  flex-basis: 100%;
+  flex-grow: 1;
   // For always expanded or extra full navbars, ensure content aligns itself
   // properly vertically. Can be easily overridden with flex utilities.
   align-items: center;