diff --git a/common/appspawn_server.h b/common/appspawn_server.h
index 1543d313ef4b66ced6eadc8b2fc6b601027db57f..7169347b4cbafab349f5030fa4584c4e53450853 100644
--- a/common/appspawn_server.h
+++ b/common/appspawn_server.h
@@ -39,7 +39,7 @@ extern "C" {
 
 typedef struct AppSpawnClient_ {
     uint32_t id;
-    int32_t flags;
+    uint32_t flags;
 } AppSpawnClient;
 
 #define MAX_SOCKEYT_NAME_LEN 128
diff --git a/util/src/sandbox_utils.cpp b/util/src/sandbox_utils.cpp
index 2d46e0977148ed1e5cc1d771cb1ab7fa6796632e..ce74ea733c41d733285821a705906d05ace919d4 100644
--- a/util/src/sandbox_utils.cpp
+++ b/util/src/sandbox_utils.cpp
@@ -344,7 +344,7 @@ static int32_t HandleSpecialAppMount(const ClientSocket::AppProperty *appPropert
     return -1;
 }
 
-static int ConvertFlagStr(const std::string &flagStr)
+static uint32_t ConvertFlagStr(const std::string &flagStr)
 {
     const std::map<std::string, int> flagsMap = {{"0", 0}, {"START_FLAGS_BACKUP", 1},
                                                  {"DLP_MANAGER", 2}};
@@ -353,7 +353,7 @@ static int ConvertFlagStr(const std::string &flagStr)
         return 1 << flagsMap.at(flagStr);
     }
 
-    return -1;
+    return 0;
 }
 
 int SandboxUtils::DoAllMntPointsMount(const ClientSocket::AppProperty *appProperty, nlohmann::json &appConfig)
@@ -495,7 +495,7 @@ int32_t SandboxUtils::HandleFlagsPoint(const ClientSocket::AppProperty *appPrope
 
         if (flagPoint.find(FLAGS) != flagPoint.end()) {
             std::string flagsStr = flagPoint[FLAGS].get<std::string>();
-            int flag = ConvertFlagStr(flagsStr);
+            uint32_t flag = ConvertFlagStr(flagsStr);
             if (appProperty->flags & flag) {
                 return DoAllMntPointsMount(appProperty, flagPoint);
             }