diff --git a/support/tools/TableGen/FileLexer.l b/support/tools/TableGen/FileLexer.l
index 9f689558c98..4f54a520a0c 100644
--- a/support/tools/TableGen/FileLexer.l
+++ b/support/tools/TableGen/FileLexer.l
@@ -1,7 +1,9 @@
 /*===-- FileLexer.l - Scanner for TableGen Files ----------------*- C++ -*-===//
 //
+// This file defines a simple flex scanner for TableGen files.  This is pretty
+// straight-forward, except for the magic to handle file inclusion.
 //
-//===------------------------------------------------------------------------=*/
+//===----------------------------------------------------------------------===*/
 
 %option prefix="File"
 %option yylineno
diff --git a/utils/TableGen/FileLexer.l b/utils/TableGen/FileLexer.l
index 9f689558c98..4f54a520a0c 100644
--- a/utils/TableGen/FileLexer.l
+++ b/utils/TableGen/FileLexer.l
@@ -1,7 +1,9 @@
 /*===-- FileLexer.l - Scanner for TableGen Files ----------------*- C++ -*-===//
 //
+// This file defines a simple flex scanner for TableGen files.  This is pretty
+// straight-forward, except for the magic to handle file inclusion.
 //
-//===------------------------------------------------------------------------=*/
+//===----------------------------------------------------------------------===*/
 
 %option prefix="File"
 %option yylineno