diff --git a/src/ripple/overlay/impl/ZeroCopyStream.h b/src/ripple/overlay/impl/ZeroCopyStream.h
index 5da2798e12..a228c1aaf5 100644
--- a/src/ripple/overlay/impl/ZeroCopyStream.h
+++ b/src/ripple/overlay/impl/ZeroCopyStream.h
@@ -38,7 +38,7 @@ private:
     using iterator = typename Buffers::const_iterator;
     using const_buffer = boost::asio::const_buffer;
 
-    std::int64_t count_ = 0;
+    google::protobuf::int64 count_ = 0;
     iterator last_;
     iterator first_;    // Where pos_ comes from
     const_buffer pos_;  // What Next() will return
@@ -56,7 +56,7 @@ public:
     bool
     Skip (int count) override;
 
-    std::int64_t
+    google::protobuf::int64
     ByteCount() const override
     {
         return count_;
@@ -142,7 +142,7 @@ private:
 
     Streambuf& streambuf_;
     std::size_t blockSize_;
-    std::size_t count_ = 0;
+    google::protobuf::int64 count_ = 0;
     std::size_t commit_ = 0;
     buffers_type buffers_;
     iterator pos_;
@@ -160,7 +160,7 @@ public:
     void
     BackUp (int count) override;
 
-    std::int64_t
+    google::protobuf::int64
     ByteCount() const override
     {
         return count_;