diff --git a/packages/svelte/src/lib/components/Handle/Handle.svelte b/packages/svelte/src/lib/components/Handle/Handle.svelte
index 48946d41..b04a20fc 100644
--- a/packages/svelte/src/lib/components/Handle/Handle.svelte
+++ b/packages/svelte/src/lib/components/Handle/Handle.svelte
@@ -98,7 +98,7 @@
     });
 
   function onConnectExtended(connection: Connection) {
-    const edge = store.onbeforeconnect?.(connection) ?? connection;
+    const edge = store.onbeforeconnect ? store.onbeforeconnect(connection) : connection;
 
     if (!edge) {
       return;
diff --git a/packages/svelte/src/lib/types/general.ts b/packages/svelte/src/lib/types/general.ts
index 701496e9..77ab58b7 100644
--- a/packages/svelte/src/lib/types/general.ts
+++ b/packages/svelte/src/lib/types/general.ts
@@ -38,11 +38,11 @@ export type OnDelete<NodeType extends Node = Node, EdgeType extends Edge = Edge>
 
 export type OnBeforeConnect<EdgeType extends Edge = Edge> = (
   connection: Connection
-) => EdgeType | Connection | void;
+) => EdgeType | Connection | void | false | null;
 export type OnBeforeReconnect<EdgeType extends Edge = Edge> = (
   newEdge: EdgeType,
   oldEdge: EdgeType
-) => EdgeType | void;
+) => EdgeType | void | false | null;
 export type OnBeforeDelete<
   NodeType extends Node = Node,
   EdgeType extends Edge = Edge