diff --git a/includes/Skins/SkinMinerva.php b/includes/Skins/SkinMinerva.php
index c9d00b689..1a940f2c7 100644
--- a/includes/Skins/SkinMinerva.php
+++ b/includes/Skins/SkinMinerva.php
@@ -170,6 +170,14 @@ class SkinMinerva extends SkinMustache {
 		$sidebar = $this->buildSidebar();
 		$actions = $nav['actions'] ?? [];
 		$views = $nav['views'] ?? [];
+		// See T66315: Wikibase link is being moved to the otherprojects sidebar.
+		// Since the other projects are not displayed in Minerva, we must manually add it back to the toolbox.
+		$wikibaseLink = array_filter( $sidebar[ 'wikibase-otherprojects' ] ?? [], static function ( $sitelink ) {
+			return $sitelink[ 'id' ] === 't-wikibase';
+		} );
+		if ( $wikibaseLink ) {
+			$sidebar['TOOLBOX']['wikibase'] = $wikibaseLink[0];
+		}
 		return $pageActionsDirector->buildMenu( $sidebar['TOOLBOX'], $actions, $views );
 	}