diff --git a/library/Icingadb/Model/DependencyEdge.php b/library/Icingadb/Model/DependencyEdge.php
index 7674ce3ed..fdf299595 100644
--- a/library/Icingadb/Model/DependencyEdge.php
+++ b/library/Icingadb/Model/DependencyEdge.php
@@ -62,8 +62,11 @@ public function createRelations(Relations $relations): void
 
         // "from" and "to" are only necessary for sub-query filters.
         $relations->belongsTo('from', DependencyNode::class)
-            ->setCandidateKey('from_node_id');
+            ->setCandidateKey('from_node_id')
+            ->setJoinType('LEFT');
+
         $relations->belongsTo('to', DependencyNode::class)
-            ->setCandidateKey('to_node_id');
+            ->setCandidateKey('to_node_id')
+            ->setJoinType('LEFT');
     }
 }
diff --git a/library/Icingadb/Model/RedundancyGroup.php b/library/Icingadb/Model/RedundancyGroup.php
index d4e20140d..77cb49919 100644
--- a/library/Icingadb/Model/RedundancyGroup.php
+++ b/library/Icingadb/Model/RedundancyGroup.php
@@ -65,10 +65,13 @@ public function createRelations(Relations $relations): void
         $relations->belongsToMany('from', DependencyEdge::class)
             ->setTargetCandidateKey('from_node_id')
             ->setTargetForeignKey('id')
-            ->through(DependencyNode::class);
+            ->through(DependencyNode::class)
+            ->setJoinType('LEFT');
+
         $relations->belongsToMany('to', DependencyEdge::class)
             ->setTargetCandidateKey('to_node_id')
             ->setTargetForeignKey('id')
-            ->through(DependencyNode::class);
+            ->through(DependencyNode::class)
+            ->setJoinType('LEFT');
     }
 }