diff --git a/indra/llcorehttp/bufferarray.cpp b/indra/llcorehttp/bufferarray.cpp
index 47389da0bebb154c00bd800b07e9898f18c7b72a..36a8006bcebcab63d4e6a27da959c40fc86e4eae 100644
--- a/indra/llcorehttp/bufferarray.cpp
+++ b/indra/llcorehttp/bufferarray.cpp
@@ -85,7 +85,9 @@ class BufferArray::Block
 // ==================================
 
 
+#if	! defined(WIN32)
 const size_t BufferArray::BLOCK_ALLOC_SIZE;
+#endif	// ! defined(WIN32)
 
 BufferArray::BufferArray()
 	: LLCoreInt::RefCounted(true),