diff --git a/.changeset/great-toes-behave.md b/.changeset/great-toes-behave.md
new file mode 100644
index 0000000000..26e36f70f1
--- /dev/null
+++ b/.changeset/great-toes-behave.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix: correct types for `ontoggle` on <details> elements
diff --git a/packages/svelte/elements.d.ts b/packages/svelte/elements.d.ts
index 885004dd2a..f18b7dea98 100644
--- a/packages/svelte/elements.d.ts
+++ b/packages/svelte/elements.d.ts
@@ -952,9 +952,9 @@ export interface HTMLDetailsAttributes extends HTMLAttributes<HTMLDetailsElement
 
 	'bind:open'?: boolean | undefined | null;
 
-	'on:toggle'?: EventHandler<Event, HTMLDetailsElement> | undefined | null;
-	ontoggle?: EventHandler<Event, HTMLDetailsElement> | undefined | null;
-	ontogglecapture?: EventHandler<Event, HTMLDetailsElement> | undefined | null;
+	'on:toggle'?: ToggleEventHandler<HTMLDetailsElement> | undefined | null;
+	ontoggle?: ToggleEventHandler<HTMLDetailsElement> | undefined | null;
+	ontogglecapture?: ToggleEventHandler<HTMLDetailsElement> | undefined | null;
 }
 
 export interface HTMLDelAttributes extends HTMLAttributes<HTMLModElement> {