diff --git a/cde/programs/dtmail/include/DtMail/Buffer.hh b/cde/programs/dtmail/include/DtMail/Buffer.hh
index 59a95ab58..3db90f703 100644
--- a/cde/programs/dtmail/include/DtMail/Buffer.hh
+++ b/cde/programs/dtmail/include/DtMail/Buffer.hh
@@ -103,7 +103,9 @@ class BufferMemory : public Buffer {
 	virtual int getSize(void);      // get total size of the buffer
 
     private:
+#if !defined(linux)
 	class Chunk;
+#endif
 
 	BufferMemory(const Buffer&);	// try and avoid copies
 	void initBuffer(int size);	// common constructor