diff --git a/libc/bionic/ndk_cruft.cpp b/libc/bionic/ndk_cruft.cpp
index 1284b9a..ed60ea4 100644
--- a/libc/bionic/ndk_cruft.cpp
+++ b/libc/bionic/ndk_cruft.cpp
@@ -40,6 +40,7 @@
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <unistd.h>
+#include <wchar.h>
 
 // These were accidentally declared in <unistd.h> because we stupidly used to inline
 // getpagesize() and __getpageshift(). Needed for backwards compatibility with old NDK apps.
@@ -221,4 +222,8 @@
   return syscall(__NR_tkill, tid, sig);
 }
 
+extern "C" wchar_t* wcswcs(wchar_t* haystack, wchar_t* needle) {
+  return wcsstr(haystack, needle);
+}
+
 #endif