diff --git a/openssl/src/crypto.rs b/openssl/src/crypto.rs
index 9853d99c..16698b40 100644
--- a/openssl/src/crypto.rs
+++ b/openssl/src/crypto.rs
@@ -1,3 +1,4 @@
+#![doc(hidden)]
 use string::OpensslString;
 
 #[deprecated(note = "renamed to OpensslString", since = "0.9.7")]