diff --git a/pxr/usd/lib/sdf/textFileFormat.tab.cpp b/pxr/usd/lib/sdf/textFileFormat.tab.cpp
index 564edc0f64..9a2f883649 100644
--- a/pxr/usd/lib/sdf/textFileFormat.tab.cpp
+++ b/pxr/usd/lib/sdf/textFileFormat.tab.cpp
@@ -6506,7 +6506,6 @@ struct Sdf_MemoryFlexBuffer : public boost::noncopyable
     yy_buffer_state *_flexBuffer;
 
     std::unique_ptr<char[]> _fileBuffer;
-    size_t _fileBufferSize;
 
     yyscan_t _scanner;
 };
diff --git a/pxr/usd/lib/sdf/textFileFormat.yy b/pxr/usd/lib/sdf/textFileFormat.yy
index 1886590e44..d4eb29f396 100644
--- a/pxr/usd/lib/sdf/textFileFormat.yy
+++ b/pxr/usd/lib/sdf/textFileFormat.yy
@@ -3265,7 +3265,6 @@ private:
     yy_buffer_state *_flexBuffer;
 
     std::unique_ptr<char[]> _fileBuffer;
-    size_t _fileBufferSize;
 
     yyscan_t _scanner;
 };