diff --git a/src/untrusted.rs b/src/untrusted.rs
index 2f88bb4..b9f1439 100644
--- a/src/untrusted.rs
+++ b/src/untrusted.rs
@@ -102,6 +102,9 @@
 )]
 #![no_std]
 
+// ANDROID: use std to allow building as a dylib.
+#[cfg(android_dylib)]
+extern crate std;
+
 /// A wrapper around `&'a [u8]` that helps in writing panic-free code.
 ///
 /// No methods of `Input` will ever panic.