diff --git a/libc/bionic/ndk_cruft.cpp b/libc/bionic/ndk_cruft.cpp
index 4834d6e..43078fd 100644
--- a/libc/bionic/ndk_cruft.cpp
+++ b/libc/bionic/ndk_cruft.cpp
@@ -255,4 +255,15 @@
   return wait4(-1, status, options, rusage);
 }
 
+// This was removed from POSIX 2004.
+extern "C" int getdtablesize() {
+  struct rlimit r;
+
+  if (getrlimit(RLIMIT_NOFILE, &r) < 0) {
+    return sysconf(_SC_OPEN_MAX);
+  }
+
+  return r.rlim_cur;
+}
+
 #endif