diff --git a/base/src/parcel.cpp b/base/src/parcel.cpp
index 65b15f4ea1ed3e4b463f01753583a98ce433eeb6..1dfe9311cf8100a0406f9d4a82731b06ce7fb432 100644
--- a/base/src/parcel.cpp
+++ b/base/src/parcel.cpp
@@ -1044,7 +1044,7 @@ bool Parcel::ReadString16(std::u16string &value)
     }
 
     size_t readCapacity = (static_cast<size_t>(dataLength) + 1) * sizeof(char16_t);
-    if (readCapacity <= GetReadableBytes()) {
+    if ((readCapacity > (static_cast<size_t>(dataLength))) && (readCapacity <= GetReadableBytes())) {
         const uint8_t *str = ReadBuffer(readCapacity);
         if (str != nullptr) {
             const auto *u16Str = reinterpret_cast<const char16_t *>(str);