diff --git a/src/lib.rs b/src/lib.rs
index 8d81b70c..456c8c7d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -9,6 +9,9 @@ extern crate libc;
 extern crate serialize;
 extern crate sync;
 
+#[cfg(target_os = "nacl")]
+extern crate "openssl-sys" as _unused;
+
 mod macros;
 
 pub mod asn1;