diff --git a/indra/llplugin/llpluginprocessparent.cpp b/indra/llplugin/llpluginprocessparent.cpp
index 4b80a4e452..dd138f1a0c 100644
--- a/indra/llplugin/llpluginprocessparent.cpp
+++ b/indra/llplugin/llpluginprocessparent.cpp
@@ -187,8 +187,18 @@ LLPluginProcessParent::ptr_t LLPluginProcessParent::create(LLPluginProcessParent
 /*static*/
 void LLPluginProcessParent::shutdown()
 {
-    LLCoros::LockType lock(*sInstancesMutex);
-
+    // <FS:Beq> FIRE-34497 - lock maybe be null during shutdown due to fiber shutdown race condition
+    // LLCoros::LockType lock(*sInstancesMutex);
+    std::unique_ptr<LLCoros::LockType> lock;
+    if (sInstancesMutex)
+    {
+        lock = std::make_unique<LLCoros::LockType>(*sInstancesMutex);
+    }
+    else
+    {
+        LL_WARNS("Plugin") << "shutdown called but no instances mutex available" << LL_ENDL;
+    }
+    // </FS:Beq>
     mapInstances_t::iterator it;
     for (it = sInstances.begin(); it != sInstances.end(); ++it)
     {