diff --git a/test/fuzztest/appmanager_fuzzer/appmanager_fuzzer.cpp b/test/fuzztest/appmanager_fuzzer/appmanager_fuzzer.cpp
index 4000883725..6c02ed210d 100644
--- a/test/fuzztest/appmanager_fuzzer/appmanager_fuzzer.cpp
+++ b/test/fuzztest/appmanager_fuzzer/appmanager_fuzzer.cpp
@@ -35,6 +35,7 @@ constexpr size_t U32_AT_SIZE = 4;
 constexpr size_t OFFSET_ZERO = 24;
 constexpr size_t OFFSET_ONE = 16;
 constexpr size_t OFFSET_TWO = 8;
+constexpr uint32_t MAX_APP_MGR_INTERFACE_CODE = 999; // 999 is max interface code.
 const std::u16string APPMGR_INTERFACE_TOKEN = u"ohos.appexecfwk.AppMgr";
 }
 
@@ -47,8 +48,7 @@ uint32_t GetU32Data(const char* ptr)
 
 bool DoSomethingInterestingWithMyAPI(const char* data, size_t size)
 {
-    for (uint32_t code = 0;
-        code <= static_cast<uint32_t>(AppMgrInterfaceCode::UPDATE_PROCESS_MEMORY_STATE); ++code) {
+    for (uint32_t code = 0; code <= MAX_APP_MGR_INTERFACE_CODE; ++code) {
         MessageParcel parcel;
         parcel.WriteInterfaceToken(APPMGR_INTERFACE_TOKEN);
         parcel.WriteBuffer(data, size);