1 files changed, 1 insertions, 1 deletions
diff --git a/js/dispatch.ts b/js/dispatch.ts
index e52a6f64c..55ea682fc 100644
--- a/js/dispatch.ts
+++ b/js/dispatch.ts
@@ -17,7 +17,7 @@ export function setFireTimersCallback(fn: () => void) {
 export function handleAsyncMsgFromRust(ui8: Uint8Array) {
   // If a the buffer is empty, recv() on the native side timed out and we
   // did not receive a message.
-  if (ui8.length) {
+  if (ui8 && ui8.length) {
     const bb = new flatbuffers.ByteBuffer(ui8);
     const base = msg.Base.getRootAsBase(bb);
     const cmdId = base.cmdId();