diff --git a/llvm/utils/gn/secondary/lldb/test/BUILD.gn b/llvm/utils/gn/secondary/lldb/test/BUILD.gn
index 7f99166995dca..fcb1ee371ed57 100644
--- a/llvm/utils/gn/secondary/lldb/test/BUILD.gn
+++ b/llvm/utils/gn/secondary/lldb/test/BUILD.gn
@@ -111,6 +111,7 @@ write_lit_cfg("lit_shell_site_cfg") {
     "LLDB_TEST_MODULE_CACHE_LLDB=" +
         rebase_path(
             "$target_gen_dir/lldb-test-build.noindex/module-cache-lldb"),
+    "LLDB_TEST_OBJC_GNUSTEP_DIR=",
     "LLDB_TOOL_LLDB_SERVER_BUILD=1",
     "LLDB_TOOLS_DIR=" + rebase_path("$root_out_dir/bin"),
     "LLDB_USE_SYSTEM_DEBUGSERVER=1",  # XXX port //lldb/tools/debugserver (?)