diff --git a/clang/cmake/modules/AddClang.cmake b/clang/cmake/modules/AddClang.cmake
--- a/clang/cmake/modules/AddClang.cmake
+++ b/clang/cmake/modules/AddClang.cmake
@@ -70,7 +70,7 @@
         ${CLANG_SOURCE_DIR}/include/clang/${lib_path}/*.td
       )
       source_group("TableGen descriptions" FILES ${tds})
-      set_source_files_properties(${tds}} PROPERTIES HEADER_FILE_ONLY ON)
+      set_source_files_properties(${tds} PROPERTIES HEADER_FILE_ONLY ON)
 
       if(headers OR tds)
         set(srcs ${headers} ${tds})