diff --git a/libc/bionic/rand.cpp b/libc/bionic/rand.cpp
new file mode 100644
index 0000000..0074f2d
--- /dev/null
+++ b/libc/bionic/rand.cpp
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdlib.h>
+
+// The BSD rand/srand is very weak. glibc just uses random/srandom instead.
+// Since we're likely to run code intended for glibc, and POSIX doesn't seem
+// to disallow this, we go that route too.
+
+int rand() {
+  return random();
+}
+
+void srand(unsigned int seed) {
+  return srandom(seed);
+}