diff --git a/accessible/ipc/DocAccessibleParent.cpp b/accessible/ipc/DocAccessibleParent.cpp
index c2baa2613f7d..a63f6b715085 100644
--- a/accessible/ipc/DocAccessibleParent.cpp
+++ b/accessible/ipc/DocAccessibleParent.cpp
@@ -476,6 +476,10 @@ mozilla::ipc::IPCResult DocAccessibleParent::RecvScrollingEvent(
 mozilla::ipc::IPCResult DocAccessibleParent::RecvCache(
     const mozilla::a11y::CacheUpdateType& aUpdateType,
     nsTArray<CacheData>&& aData, const bool& aFinal) {
+  if (mShutdown) {
+    return IPC_OK();
+  }
+
   for (auto& entry : aData) {
     RemoteAccessible* remote = GetAccessible(entry.ID());
     if (!remote) {