diff --git a/src/node_http2_core-inl.h b/src/node_http2_core-inl.h
index 8158abeabc98da..085631dc38872f 100644
--- a/src/node_http2_core-inl.h
+++ b/src/node_http2_core-inl.h
@@ -591,7 +591,7 @@ inline int Nghttp2Session::Free() {
   CHECK(session_ != nullptr);
   DEBUG_HTTP2("Nghttp2Session %s: freeing session\n", TypeName());
   // Stop the loop
-  uv_prepare_stop(&prep_);
+  CHECK_EQ(uv_prepare_stop(&prep_), 0);
   auto PrepClose = [](uv_handle_t* handle) {
     Nghttp2Session* session =
         ContainerOf(&Nghttp2Session::prep_,