diff --git a/libc/config/linux/riscv64/entrypoints.txt b/libc/config/linux/riscv64/entrypoints.txt
--- a/libc/config/linux/riscv64/entrypoints.txt
+++ b/libc/config/linux/riscv64/entrypoints.txt
@@ -326,6 +326,12 @@
     # assert.h entrypoints
     libc.src.assert.__assert_fail
 
+    # dirent.h entrypoints
+    libc.src.dirent.closedir
+    libc.src.dirent.dirfd
+    libc.src.dirent.opendir
+    libc.src.dirent.readdir
+
     # network.h entrypoints
     libc.src.network.htonl
     libc.src.network.htons
diff --git a/libc/config/linux/riscv64/headers.txt b/libc/config/linux/riscv64/headers.txt
--- a/libc/config/linux/riscv64/headers.txt
+++ b/libc/config/linux/riscv64/headers.txt
@@ -1,6 +1,7 @@
 set(TARGET_PUBLIC_HEADERS
     libc.include.assert
     libc.include.ctype
+    libc.include.dirent
     libc.include.errno
     libc.include.fcntl
     libc.include.fenv
diff --git a/libc/include/llvm-libc-types/CMakeLists.txt b/libc/include/llvm-libc-types/CMakeLists.txt
--- a/libc/include/llvm-libc-types/CMakeLists.txt
+++ b/libc/include/llvm-libc-types/CMakeLists.txt
@@ -1,4 +1,5 @@
 add_header(off64_t HDR off64_t.h)
+add_header(ino64_t HDR ino64_t.h)
 add_header(size_t HDR size_t.h)
 add_header(ssize_t HDR ssize_t.h)
 add_header(__atfork_callback_t HDR __atfork_callback_t.h)
@@ -59,7 +60,7 @@
 add_header(struct_timeval HDR struct_timeval.h DEPENDS .suseconds_t .time_t)
 add_header(struct_rlimit HDR struct_rlimit.h DEPENDS .rlim_t)
 add_header(struct_rusage HDR struct_rusage.h DEPENDS .struct_timeval)
-add_header(struct_dirent HDR struct_dirent.h DEPENDS .ino_t .off_t)
+add_header(struct_dirent HDR struct_dirent.h DEPENDS .ino_t .off_t .ino64_t .off64_t)
 add_header(union_sigval HDR union_sigval.h)
 add_header(siginfo_t HDR siginfo_t.h DEPENDS .union_sigval .pid_t .uid_t)
 add_header(sig_atomic_t HDR sig_atomic_t.h)
diff --git a/libc/include/llvm-libc-types/ino64_t.h b/libc/include/llvm-libc-types/ino64_t.h
new file mode 100644
--- /dev/null
+++ b/libc/include/llvm-libc-types/ino64_t.h
@@ -0,0 +1,14 @@
+//===-- Definition of ino64_t type ----------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef __LLVM_LIBC_TYPES_INO_T_H__
+#define __LLVM_LIBC_TYPES_INO_T_H__
+
+typedef __UINTPTR_TYPE__ ino64_t;
+
+#endif // __LLVM_LIBC_TYPES_INO_T_H__
diff --git a/libc/include/llvm-libc-types/struct_dirent.h b/libc/include/llvm-libc-types/struct_dirent.h
--- a/libc/include/llvm-libc-types/struct_dirent.h
+++ b/libc/include/llvm-libc-types/struct_dirent.h
@@ -9,8 +9,20 @@
 #ifndef __LLVM_LIBC_TYPES_STRUCT_DIRENT_H__
 #define __LLVM_LIBC_TYPES_STRUCT_DIRENT_H__
 
+#include <sys/syscall.h> // For syscall definitions.
+
+#ifdef SYS_getdents64
+#include <llvm-libc-types/ino64_t.h>
+#include <llvm-libc-types/off64_t.h>
+#else
 #include <llvm-libc-types/ino_t.h>
 #include <llvm-libc-types/off_t.h>
+#endif
+
+#ifdef SYS_getdents64
+typedef ino64_t ino_t;
+typedef off64_t off_t;
+#endif
 
 struct dirent {
   ino_t d_ino;
@@ -18,6 +30,7 @@
   off_t d_off;
   unsigned short d_reclen;
 #endif
+  unsigned char d_type;
   // The user code should use strlen to determine actual the size of d_name.
   // Likewise, it is incorrect and prohibited by the POSIX standard to detemine
   // the size of struct dirent type using sizeof. The size should be got using
diff --git a/libc/src/__support/File/dir.cpp b/libc/src/__support/File/dir.cpp
--- a/libc/src/__support/File/dir.cpp
+++ b/libc/src/__support/File/dir.cpp
@@ -40,7 +40,30 @@
   if (fillsize == 0)
     return nullptr;
 
+#ifdef SYS_getdents64
   struct ::dirent *d = reinterpret_cast<struct ::dirent *>(buffer + readptr);
+#elif defined(SYS_getdents)
+  // from https://man7.org/linux/man-pages/man2/getdents.2.html, SYS_getdents
+  // returns a slightly different dirent struct:
+  struct linux_dirent {
+    unsigned long d_ino;
+    unsigned long d_off;
+    unsigned short d_reclen;
+    char d_name[1];
+    /*
+    char           pad;       // Zero padding byte
+    char           d_type;    // File type (only since Linux
+                              // 2.6.4); offset is (d_reclen - 1)
+    */
+  };
+
+  // TODO: so we need to convert the contents from buffer (i.e., a series of
+  // struct linux_dirent) structs into struct dirent and return to the user.
+#else
+#error                                                                         \
+    "SYS_getdents and SYS_getdents64 syscalls not available to perform a read operation."
+#endif
+
 #ifdef __unix__
   // The d_reclen field is available on Linux but not required by POSIX.
   readptr += d->d_reclen;
diff --git a/libc/src/__support/File/linux_dir.cpp b/libc/src/__support/File/linux_dir.cpp
--- a/libc/src/__support/File/linux_dir.cpp
+++ b/libc/src/__support/File/linux_dir.cpp
@@ -34,8 +34,17 @@
 }
 
 ErrorOr<size_t> platform_fetch_dirents(int fd, cpp::span<uint8_t> buffer) {
+#ifdef SYS_getdents64
+  long size = __llvm_libc::syscall_impl(SYS_getdents64, fd, buffer.data(),
+                                        buffer.size());
+#elif defined(SYS_getdents)
   long size =
       __llvm_libc::syscall_impl(SYS_getdents, fd, buffer.data(), buffer.size());
+#else
+#error                                                                         \
+    "SYS_getdents and SYS_getdents64 syscalls not available to perform a fetch dirents operation."
+#endif
+
   if (size < 0) {
     return __llvm_libc::Error(static_cast<int>(-size));
   }