diff --git a/src/applications/project/conduit/ProjectQueryConduitAPIMethod.php b/src/applications/project/conduit/ProjectQueryConduitAPIMethod.php
--- a/src/applications/project/conduit/ProjectQueryConduitAPIMethod.php
+++ b/src/applications/project/conduit/ProjectQueryConduitAPIMethod.php
@@ -97,8 +97,9 @@
     // TODO: This is pretty hideous.
     $slug_map = array();
     foreach ($slugs as $slug) {
+      $normal = rtrim(PhabricatorSlug::normalize($slug), '/');
       foreach ($projects as $project) {
-        if (in_array($slug, $project['slugs'])) {
+        if (in_array($normal, $project['slugs'])) {
           $slug_map[$slug] = $project['phid'];
         }
       }
diff --git a/src/applications/project/query/PhabricatorProjectQuery.php b/src/applications/project/query/PhabricatorProjectQuery.php
--- a/src/applications/project/query/PhabricatorProjectQuery.php
+++ b/src/applications/project/query/PhabricatorProjectQuery.php
@@ -266,10 +266,15 @@
     }
 
     if ($this->slugs) {
+      $slugs = array();
+      foreach ($this->slugs as $slug) {
+        $slugs[] = rtrim(PhabricatorSlug::normalize($slug), '/');
+      }
+
       $where[] = qsprintf(
         $conn_r,
         'slug.slug IN (%Ls)',
-        $this->slugs);
+        $slugs);
     }
 
     if ($this->phrictionSlugs) {