diff --git a/src/project.cc b/src/project.cc
index 6411d1ae..541df686 100644
--- a/src/project.cc
+++ b/src/project.cc
@@ -27,6 +27,8 @@
 #include <unordered_set>
 #include <vector>
 
+extern bool gTestOutputMode;
+
 struct CompileCommandsEntry {
   std::string directory;
   std::string file;
@@ -208,6 +210,12 @@ Project::Entry GetCompilationEntryFromCompileCommandEntry(
   if (!AnyStartsWith(args, "-working-directory"))
     result.args.emplace_back("-working-directory=" + entry.directory);
 
+  if (!gTestOutputMode) {
+    std::vector<const char*> platform = GetPlatformClangArguments();
+    for (auto arg : platform)
+      result.args.push_back(arg);
+  }
+
   bool next_flag_is_path = false;
   bool add_next_flag_to_quote_dirs = false;
   bool add_next_flag_to_angle_dirs = false;
@@ -622,6 +630,7 @@ TEST_SUITE("Project") {
                   std::vector<std::string> raw,
                   std::vector<std::string> expected) {
     g_disable_normalize_path_for_test = true;
+    gTestOutputMode = true;
 
     Config config;
     ProjectConfig project;