diff --git a/src/service/http/builder.rs b/src/service/http/builder.rs
index f0bf5d7c..4e8a6bb3 100644
--- a/src/service/http/builder.rs
+++ b/src/service/http/builder.rs
@@ -104,7 +104,7 @@ where
 
     #[cfg(feature = "open-api")]
     pub fn api_router(mut self, router: ApiRouter<S>) -> Self {
-        self.router = self.router.merge(router);
+        self.api_router = self.api_router.merge(router);
         self
     }