diff --git a/src/Saft/Addition/ARC2/Store/ARC2.php b/src/Saft/Addition/ARC2/Store/ARC2.php
index <HASH>..<HASH> 100644
--- a/src/Saft/Addition/ARC2/Store/ARC2.php
+++ b/src/Saft/Addition/ARC2/Store/ARC2.php
@@ -315,7 +315,9 @@ class ARC2 extends AbstractSparqlStore
 
         // collect graph URI's
         while ($row = $result->fetch_assoc()) {
-            $graphs[$row['graphUri']] = $this->nodeFactory->createNamedNode($row['graphUri']);
+            if (NodeUtils::simpleCheckURI($row['graphUri'])) {
+                $graphs[$row['graphUri']] = $this->nodeFactory->createNamedNode($row['graphUri']);
+            }
         }
 
         return $graphs;
ARC2: Add further check in getGraphs to avoid errors if no graph was found