diff --git a/libc/bionic/ndk_cruft.cpp b/libc/bionic/ndk_cruft.cpp
index b915382..b0346d4 100644
--- a/libc/bionic/ndk_cruft.cpp
+++ b/libc/bionic/ndk_cruft.cpp
@@ -29,6 +29,7 @@
 // This file perpetuates the mistakes of the past, but only for 32-bit targets.
 #if !defined(__LP64__)
 
+#include <pthread.h>
 #include <stdlib.h>
 #include <sys/resource.h>
 #include <sys/time.h>
@@ -73,4 +74,17 @@
   }
 }
 
+extern "C" int pthread_attr_setstackaddr(pthread_attr_t*, void*) {
+  // This was removed from POSIX.1-2008, and is not implemented on bionic.
+  // Needed for ABI compatibility with the NDK.
+  return ENOSYS;
+}
+
+extern "C" int pthread_attr_getstackaddr(const pthread_attr_t* attr, void** stack_addr) {
+  // This was removed from POSIX.1-2008.
+  // Needed for ABI compatibility with the NDK.
+  *stack_addr = (char*)attr->stack_base + attr->stack_size;
+  return 0;
+}
+
 #endif