---
 src/lib.rs | 4 ++++
 1 file changed, 4 insertions(+)

diff --git b/src/lib.rs a/src/lib.rs
index 33ceef8e..53730d4c 100644
--- b/src/lib.rs
+++ a/src/lib.rs
@@ -70,6 +70,10 @@
 //! [PKCS#5v2 Password Based Encryption Scheme 2 (RFC 8018)]: https://tools.ietf.org/html/rfc8018#section-6.2
 //! [scrypt]: https://en.wikipedia.org/wiki/Scrypt
 
+/// Local Android change: Use std to allow building as a dylib.
+#[cfg(android_dylib)]
+extern crate std;
+
 #[cfg(feature = "pem")]
 extern crate alloc;
 #[cfg(feature = "std")]