diff --git a/src/Plugin/ProjectBrowserSource/DrupalCore.php b/src/Plugin/ProjectBrowserSource/DrupalCore.php
index c981015a4fc6979efe75ee1f9de18e7b202cfd4b..48868d19645535b7bc73e9ec6750440b23a023fc 100644
--- a/src/Plugin/ProjectBrowserSource/DrupalCore.php
+++ b/src/Plugin/ProjectBrowserSource/DrupalCore.php
@@ -113,7 +113,7 @@ final class DrupalCore extends ProjectBrowserSourceBase {
 
     // Filter by categories.
     if (!empty($query['categories'])) {
-      $projects = array_filter($projects, fn(Project $project): bool => empty(array_intersect(array_column($project->categories, 'id'), explode(',', $query['categories']))));
+      $projects = array_filter($projects, fn(Project $project): bool => !empty(array_intersect(array_column($project->categories, 'id'), explode(',', $query['categories']))));
     }
 
     // Filter by search text.