diff --git a/test/lit.site.cfg.in b/test/lit.site.cfg.in
index 0bbd414..9943ba3 100644
--- a/test/lit.site.cfg.in
+++ b/test/lit.site.cfg.in
@@ -4,6 +4,7 @@
 config.llvm_obj_root = "@LLVM_BINARY_DIR@"
 config.llvm_tools_dir = "@LLVM_TOOLS_DIR@"
 config.llvm_libs_dir = "@LLVM_LIBS_DIR@"
+config.lit_tools_dir = "@LLVM_LIT_TOOLS_DIR@"
 config.llvm_build_modes = "@LLVM_BUILD_MODE@".split('+')
 config.clang_obj_root = "@CLANG_BINARY_DIR@"
 config.target_triple = "@TARGET_TRIPLE@"