diff --git a/libc/bionic/lfs64_support.cpp b/libc/bionic/lfs64_support.cpp
index 138094e..ab795f5 100644
--- a/libc/bionic/lfs64_support.cpp
+++ b/libc/bionic/lfs64_support.cpp
@@ -14,6 +14,7 @@
  * limitations under the License.
  */
 
+#include <ftw.h>
 #include <stdlib.h>
 
 int mkstemp64(char* filename) {
@@ -22,3 +23,17 @@
   // open (our open is actually open64) and stat and stat64 are the same.
   return mkstemp(filename);
 }
+
+typedef int (*ftw_fn)(const char*, const struct stat*, int);
+typedef int (*nftw_fn)(const char*, const struct stat*, int, struct FTW*);
+
+int ftw64(const char *dirpath,
+    int (*fn)(const char*, const struct stat64*, int), int nopenfd) {
+  return ftw(dirpath, reinterpret_cast<ftw_fn>(fn), nopenfd);
+}
+
+int nftw64(const char * dirpath,
+    int (*fn)(const char*, const struct stat64*, int, struct FTW*),
+    int nopenfd, int flags) {
+  return nftw(dirpath, reinterpret_cast<nftw_fn>(fn), nopenfd, flags);
+}
diff --git a/libc/include/ftw.h b/libc/include/ftw.h
index 3bebea3..af524d0 100644
--- a/libc/include/ftw.h
+++ b/libc/include/ftw.h
@@ -57,6 +57,9 @@
 int	ftw(const char *, int (*)(const char *, const struct stat *, int), int);
 int	nftw(const char *, int (*)(const char *, const struct stat *, int,
 	    struct FTW *), int, int);
+int	ftw64(const char *, int (*)(const char *, const struct stat64 *, int), int);
+int	nftw64(const char *, int (*)(const char *, const struct stat64 *, int,
+	    struct FTW *), int, int);
 __END_DECLS
 
 #endif	/* !_FTW_H */
diff --git a/tests/Android.mk b/tests/Android.mk
index 4879e52..5fafba6 100644
--- a/tests/Android.mk
+++ b/tests/Android.mk
@@ -44,6 +44,7 @@
     eventfd_test.cpp \
     fcntl_test.cpp \
     fenv_test.cpp \
+    ftw_test.cpp \
     getauxval_test.cpp \
     getcwd_test.cpp \
     inttypes_test.cpp \
diff --git a/tests/TemporaryFile.h b/tests/TemporaryFile.h
index 2c6fb1c..a7b13b0 100644
--- a/tests/TemporaryFile.h
+++ b/tests/TemporaryFile.h
@@ -16,17 +16,21 @@
 
 #include <unistd.h>
 
-template<int (*mk_func)(char*)>
+template<int (*mk_fn)(char*)>
 class GenericTemporaryFile {
  public:
-  GenericTemporaryFile() {
-    // Since we might be running on the host or the target, and if we're
-    // running on the host we might be running under bionic or glibc,
-    // let's just try both possible temporary directories and take the
-    // first one that works.
-    init("/data/local/tmp");
-    if (fd == -1) {
-      init("/tmp");
+  GenericTemporaryFile(const char* dirpath = NULL) {
+    if (dirpath != NULL) {
+      init(dirpath);
+    } else {
+      // Since we might be running on the host or the target, and if we're
+      // running on the host we might be running under bionic or glibc,
+      // let's just try both possible temporary directories and take the
+      // first one that works.
+      init("/data/local/tmp");
+      if (fd == -1) {
+        init("/tmp");
+      }
     }
   }
 
@@ -41,8 +45,30 @@
  private:
   void init(const char* tmp_dir) {
     snprintf(filename, sizeof(filename), "%s/TemporaryFile-XXXXXX", tmp_dir);
-    fd = mk_func(filename);
+    fd = mk_fn(filename);
   }
 };
 
 typedef GenericTemporaryFile<mkstemp> TemporaryFile;
+
+class TemporaryDir {
+ public:
+  TemporaryDir() {
+    if (!init("/data/local/tmp")) {
+      init("/tmp");
+    }
+  }
+
+  ~TemporaryDir() {
+    rmdir(dirname);
+  }
+
+  char dirname[1024];
+
+ private:
+  bool init(const char* tmp_dir) {
+    snprintf(dirname, sizeof(dirname), "%s/TemporaryDir-XXXXXX", tmp_dir);
+    return (mkdtemp(dirname) != NULL);
+  }
+
+};
diff --git a/tests/ftw_test.cpp b/tests/ftw_test.cpp
new file mode 100644
index 0000000..6d3a308
--- /dev/null
+++ b/tests/ftw_test.cpp
@@ -0,0 +1,85 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+#include "TemporaryFile.h"
+
+#include <ftw.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+
+void sanity_check_ftw(const char* fpath, const struct stat* sb, int tflag) {
+  ASSERT_TRUE(fpath != NULL);
+  ASSERT_TRUE(sb != NULL);
+  bool is_dir = S_ISDIR(sb->st_mode);
+  ASSERT_TRUE((is_dir && tflag == FTW_D) || (!is_dir && tflag == FTW_F));
+}
+
+void sanity_check_nftw(
+    const char* fpath, const struct stat* sb, int tflag, struct FTW* ftwbuf) {
+  sanity_check_ftw(fpath, sb, tflag);
+  // either the parent dir or the file
+  bool is_dir = S_ISDIR(sb->st_mode);
+  ASSERT_TRUE(
+    (is_dir && ftwbuf->level == 0) || (!is_dir && ftwbuf->level == 1));
+}
+
+int check_ftw(const char* fpath, const struct stat* sb, int tflag) {
+  sanity_check_ftw(fpath, sb, tflag);
+  return 0;
+}
+
+int check_ftw64(const char* fpath, const struct stat64* sb, int tflag) {
+  sanity_check_ftw(fpath, reinterpret_cast<const struct stat*>(sb), tflag);
+  return 0;
+}
+
+int check_nftw(
+  const char* fpath, const struct stat* sb, int tflag, struct FTW* ftwbuf) {
+  sanity_check_nftw(fpath, sb, tflag, ftwbuf);
+  return 0;
+}
+
+int check_nftw64(
+  const char* fpath, const struct stat64* sb, int tflag, struct FTW* ftwbuf) {
+  sanity_check_nftw(fpath, reinterpret_cast<const struct stat*>(sb),
+    tflag, ftwbuf);
+  return 0;
+}
+
+TEST(ftw, ftw) {
+  TemporaryDir td;
+  TemporaryFile tf(td.dirname);
+  ftw(td.dirname, check_ftw, 1);
+}
+
+TEST(ftw, ftw64) {
+  TemporaryDir td;
+  GenericTemporaryFile<mkstemp64> tf(td.dirname);
+  ftw64(td.dirname, check_ftw64, 1);
+}
+
+TEST(ftw, nftw) {
+  TemporaryDir td;
+  TemporaryFile tf(td.dirname);
+  nftw(td.dirname, check_nftw, 1, 0);
+}
+
+TEST(ftw, nftw64) {
+  TemporaryDir td;
+  GenericTemporaryFile<mkstemp64> tf(td.dirname);
+  nftw64(td.dirname, check_nftw64, 1, 0);
+}