diff --git a/libc/include/fts.h b/libc/include/fts.h
index 8dfd213..aabe2db 100644
--- a/libc/include/fts.h
+++ b/libc/include/fts.h
@@ -119,7 +119,7 @@
 
 FTSENT* _Nullable fts_children(FTS* _Nonnull __fts, int __options);
 int fts_close(FTS* _Nonnull __fts);
-FTS* _Nullable fts_open(char* _Nonnull const* _Nonnull __path, int __options, int (* _Nullable __comparator)(const FTSENT* _Nonnull * _Nonnull  __lhs, const FTSENT* _Nonnull * _Nonnull __rhs));
+FTS* _Nullable fts_open(char* _Nullable const* _Nonnull __path, int __options, int (* _Nullable __comparator)(const FTSENT* _Nonnull * _Nonnull  __lhs, const FTSENT* _Nonnull * _Nonnull __rhs));
 FTSENT* _Nullable fts_read(FTS* _Nonnull __fts);
 int fts_set(FTS* _Nonnull __fts, FTSENT* _Nonnull __entry, int __options);
 
diff --git a/tests/Android.bp b/tests/Android.bp
index 9f64393..ee34666 100644
--- a/tests/Android.bp
+++ b/tests/Android.bp
@@ -404,6 +404,7 @@
         "_FILE_OFFSET_BITS_test.cpp",
         "float_test.cpp",
         "fnmatch_test.cpp",
+        "fts_test.cpp",
         "ftw_test.cpp",
         "getauxval_test.cpp",
         "getcwd_test.cpp",
diff --git a/tests/fts_test.cpp b/tests/fts_test.cpp
new file mode 100644
index 0000000..39e570b
--- /dev/null
+++ b/tests/fts_test.cpp
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2024 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <gtest/gtest.h>
+
+#if !defined(__GLIBC__)
+#include <fts.h>
+#endif
+
+TEST(fts, smoke) {
+#if !defined(__GLIBC__)
+  char* const paths[] = { const_cast<char*>("."), NULL };
+  FTS* fts = fts_open(paths, FTS_PHYSICAL, NULL);
+  ASSERT_TRUE(fts != NULL);
+  FTSENT* e;
+  while ((e = fts_read(fts)) != NULL) {
+    ASSERT_EQ(0, fts_set(fts, e, FTS_SKIP));
+  }
+  ASSERT_EQ(0, fts_close(fts));
+#else
+  GTEST_SKIP() << "no _FILE_OFFSET_BITS=64 <fts.h> in our old glibc";
+#endif
+}