diff --git a/SNAPLib/DataWriter.cpp b/SNAPLib/DataWriter.cpp
index a22a52e9..f567c4d8 100644
--- a/SNAPLib/DataWriter.cpp
+++ b/SNAPLib/DataWriter.cpp
@@ -315,7 +315,7 @@ AsyncDataWriter::advance(
     _ASSERT((size_t)bytes <= bufferSize - batches[current].used);
     char* data = batches[current].buffer + batches[current].used;
     size_t batchOffset = batches[current].used;
-    batches[current].used = min(bufferSize, batchOffset + bytes);
+    batches[current].used = min<long long>(bufferSize, batchOffset + bytes);
     if (filter != NULL) {
         //_int64 start = timeInNanos();
         filter->onAdvance(this, batchOffset, data, bytes, location);