diff --git a/packages/mindplot/src/components/RelationshipPivot.ts b/packages/mindplot/src/components/RelationshipPivot.ts
index 3941a5e5..29e4bed6 100644
--- a/packages/mindplot/src/components/RelationshipPivot.ts
+++ b/packages/mindplot/src/components/RelationshipPivot.ts
@@ -32,7 +32,7 @@ class RelationshipPivot {
 
   private _onClickEvent: (event: MouseEvent) => void;
 
-  private _onTopicClick: (event: MouseEvent) => void;;
+  private _onTopicClick: (event: MouseEvent) => void;
 
   private _sourceTopic: Topic;