diff --git a/libc/bionic/ndk_cruft.cpp b/libc/bionic/ndk_cruft.cpp
index 0c72019..45ead62 100644
--- a/libc/bionic/ndk_cruft.cpp
+++ b/libc/bionic/ndk_cruft.cpp
@@ -303,4 +303,9 @@
   return strchr(str, ch);
 }
 
+// This was removed from BSD.
+extern "C" void arc4random_stir(void) {
+  // The current implementation stirs itself as needed.
+}
+
 #endif