diff --git a/packages/core/src/types/edge.ts b/packages/core/src/types/edge.ts
index e989f006..3e92e4ce 100644
--- a/packages/core/src/types/edge.ts
+++ b/packages/core/src/types/edge.ts
@@ -172,7 +172,7 @@ export interface EdgeProps<Data = ElementData, CustomEvents = {}, Type extends s
   type: Type
   label?: string | VNode | Component<EdgeTextProps> | Object
   style?: CSSProperties
-  selected?: boolean
+  selected: boolean
   sourcePosition: Position
   targetPosition: Position
   sourceHandleId?: string