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 */