diff --git a/src/node_buffer.cc b/src/node_buffer.cc
index ff041274f90d24..72a6b96ebbfcf5 100644
--- a/src/node_buffer.cc
+++ b/src/node_buffer.cc
@@ -743,13 +743,12 @@ void SlowByteLengthUtf8(const FunctionCallbackInfo<Value>& args) {
 
 uint32_t FastByteLengthUtf8(Local<Value> receiver,
                             const v8::FastOneByteString& source) {
-  uint32_t result = 0;
   uint32_t length = source.length;
+  uint32_t result = length;
   const uint8_t* data = reinterpret_cast<const uint8_t*>(source.data);
   for (uint32_t i = 0; i < length; ++i) {
     result += (data[i] >> 7);
   }
-  result += length;
   return result;
 }