diff --git a/services/src/apn_manager/apn_manager.cpp b/services/src/apn_manager/apn_manager.cpp
index ecc6bfdbdd02eebebeae95bc6718b6d64954bbe8..553f8a396db63956e13fbc25bb343d892d7692cc 100644
--- a/services/src/apn_manager/apn_manager.cpp
+++ b/services/src/apn_manager/apn_manager.cpp
@@ -254,6 +254,7 @@ int32_t ApnManager::CreateAllApnItemByDatabase(int32_t slotId)
     if (TELEPHONY_EXT_WRAPPER.createAllApnItemExt_) {
         sptr<ApnItem> extraApnItem = ApnItem::MakeDefaultApn("default,supl");
         if (TELEPHONY_EXT_WRAPPER.createAllApnItemExt_(slotId, extraApnItem)) {
+            std::lock_guard<std::mutex> lock(mutex_);
             allApnItem_.clear();
             allApnItem_.push_back(extraApnItem);
             return ++count;