diff --git a/src/wp-includes/css/admin-bar.css b/src/wp-includes/css/admin-bar.css
index 0a9bd38ff3..37997633d2 100644
--- a/src/wp-includes/css/admin-bar.css
+++ b/src/wp-includes/css/admin-bar.css
@@ -921,6 +921,9 @@
 		to 100% viewport width at responsive sizes. */
 	#wpadminbar .ab-top-menu > .menupop > .ab-sub-wrapper {
 		min-width: intrinsic;
+		min-width: -webkit-fit-content;
+		min-width: -moz-fit-content;
+		min-width: fit-content;
 	}
 
 	#wpadminbar li#wp-admin-bar-menu-toggle,