diff --git a/projects/swimlane/ngx-graph/src/lib/graph/graph.component.ts b/projects/swimlane/ngx-graph/src/lib/graph/graph.component.ts
index a90e36ff..208ccd88 100644
--- a/projects/swimlane/ngx-graph/src/lib/graph/graph.component.ts
+++ b/projects/swimlane/ngx-graph/src/lib/graph/graph.component.ts
@@ -271,7 +271,7 @@ export class GraphComponent implements OnInit, OnChanges, OnDestroy, AfterViewIn
     if (layoutSettings) {
       this.setLayoutSettings(this.layoutSettings);
     }
-    if (this.layout && this.nodes.length && this.links.length) {
+    if (this.layout && this.nodes && this.links) {
       this.update();
     }
   }