diff --git a/.changeset/moody-islands-buy.md b/.changeset/moody-islands-buy.md
new file mode 100644
index 00000000..2626dc63
--- /dev/null
+++ b/.changeset/moody-islands-buy.md
@@ -0,0 +1,5 @@
+---
+'preact-iso': patch
+---
+
+Changed RoutableProps definition to fix a type error in preact, caused by namespace declaration merging.
diff --git a/packages/preact-iso/router.d.ts b/packages/preact-iso/router.d.ts
index ba38ef30..585edb49 100644
--- a/packages/preact-iso/router.d.ts
+++ b/packages/preact-iso/router.d.ts
@@ -25,7 +25,6 @@ export const useRoute: () => {
 
 interface RoutableProps {
 	path?: string;
-	default?: boolean;
 }
 
 export interface RouteProps<Props> extends RoutableProps {