diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index 68cf8daf3c9..5bb436e2d68 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -63,6 +63,7 @@ Yii Framework 2 Change Log
 - Enh #13560: Refactored `\yii\widgets\FragmentCache::getCachedContent()`, added tests (Kolyunya)
 - Bug #13901: Fixed passing unused parameter to `formatMessage()` call in `\yii\validators\IpValidator` (Kolyunya)
 - Enh #13945: Removed Courier New from error page fonts list since it looks bad on Linux (samdark)
+- Bug #13961: RBAC Rules: PostgreSQL: PHP Warning "unserialize() expects parameter 1 to be string, resource given" was fixed (vsguts)
 
 2.0.11.2 February 08, 2017
 --------------------------
diff --git a/framework/rbac/DbManager.php b/framework/rbac/DbManager.php
index fca49eee352..3f7becb0733 100644
--- a/framework/rbac/DbManager.php
+++ b/framework/rbac/DbManager.php
@@ -987,7 +987,11 @@ public function loadFromCache()
         $query = (new Query)->from($this->ruleTable);
         $this->rules = [];
         foreach ($query->all($this->db) as $row) {
-            $this->rules[$row['name']] = unserialize($row['data']);
+            $data = $row['data'];
+            if (is_resource($data)) {
+                $data = stream_get_contents($data);
+            }
+            $this->rules[$row['name']] = unserialize($data);
         }
 
         $query = (new Query)->from($this->itemChildTable);