diff --git a/base/src/parcel.cpp b/base/src/parcel.cpp
index d893964bb2d9111d9ddc1365ba1149872a04ad9f..d0a2d7253222c47f4b77491320638ccbadd67e05 100644
--- a/base/src/parcel.cpp
+++ b/base/src/parcel.cpp
@@ -1108,7 +1108,7 @@ const char *Parcel::ReadCString()
     const char* eos = reinterpret_cast<const char*>(memchr(cstr, 0, avail));
     if (eos != nullptr) {
         const size_t dataLength = eos - cstr;
-        if (!ValidateReadData(dataLength + 1)) {
+        if (!ValidateReadData(readCursor_ + dataLength + 1)) {
             return nullptr;
         }
         readCursor_ += (dataLength + 1);