diff --git a/services/updater_main.cpp b/services/updater_main.cpp
index 79de2492aa398444ad4dfd7c11e32ad22c47e4e8..470fd6d41074f7fb7d95ea58aa708a9ad4de19e7 100644
--- a/services/updater_main.cpp
+++ b/services/updater_main.cpp
@@ -360,7 +360,7 @@ static UpdaterStatus CalcProgress(const UpdaterParams &upParams,
     return UPDATE_SUCCESS;
 }
 
-int CheckMountData()
+static int CheckMountData()
 {
     constexpr int retryTime = 3;
     for (int i = 0; i < retryTime; i++) {
diff --git a/services/updater_main.h b/services/updater_main.h
index abb9ff5b346dee69b759f8201d776022eb885f19..699df7ee794b417234a1b392cf3effdcabb0332d 100644
--- a/services/updater_main.h
+++ b/services/updater_main.h
@@ -33,8 +33,6 @@ int UpdaterMain(int argc, char **argv);
 
 int FactoryReset(FactoryResetMode mode, const std::string &path);
 
-int CheckMountData();
-
 void RebootAfterUpdateSuccess(const UpdaterParams &upParams);
 
 UpdaterStatus InstallUpdaterPackage(UpdaterParams &upParams, Hpackage::PkgManager::PkgManagerPtr manager);