diff --git a/mlir/CMakeLists.txt b/mlir/CMakeLists.txt
--- a/mlir/CMakeLists.txt
+++ b/mlir/CMakeLists.txt
@@ -86,6 +86,7 @@
     FILES_MATCHING
     PATTERN "*.h"
     PATTERN "*.inc"
+    PATTERN "*.td"
     PATTERN "LICENSE.TXT"
     )