diff --git a/src/backend/catalog/ag_catalog.c b/src/backend/catalog/ag_catalog.c
index c0032d8d2..f4887f445 100644
--- a/src/backend/catalog/ag_catalog.c
+++ b/src/backend/catalog/ag_catalog.c
@@ -20,6 +20,7 @@
 #include "postgres.h"
 
 #include "catalog/dependency.h"
+#include "catalog/namespace.h"
 #include "catalog/objectaccess.h"
 #include "catalog/pg_class_d.h"
 #include "catalog/pg_namespace_d.h"
@@ -174,6 +175,13 @@ static void object_access(ObjectAccessType access, Oid class_id, Oid object_id,
     if (access != OAT_DROP)
         return;
 
+    /*
+     * Age might be installed into shared_preload_libraries before extension is
+     * created. In this case we must bail out from this hook.
+     */
+    if (!OidIsValid(get_namespace_oid("ag_catalog", true)))
+        return;
+
     drop_arg = arg;
 
     /*