diff --git a/unittest/dawg_test.cc b/unittest/dawg_test.cc
index 5af90b546..7e4b8b43e 100644
--- a/unittest/dawg_test.cc
+++ b/unittest/dawg_test.cc
@@ -73,7 +73,11 @@ class DawgTest : public testing::Test {
     std::string orig_wordlist = file::JoinPath(TESTING_DIR, wordlist_filename);
     std::string output_dawg = OutputNameToPath(wordlist_filename + ".dawg");
     std::string output_wordlist = OutputNameToPath(wordlist_filename);
-    mkdir(FLAGS_test_tmpdir);
+#if defined(_WIN32)
+    _mkdir(FLAGS_test_tmpdir);
+#else
+    mkdir(FLAGS_test_tmpdir, S_IRWXU | S_IRWXG);
+#endif
     LoadWordlist(orig_wordlist, &orig_words);
     EXPECT_EQ(
         RunCommand(wordlist2dawg_prog, orig_wordlist, output_dawg, unicharset), 0);