diff --git a/keystore2/src/lib.rs b/keystore2/src/lib.rs
index 6b1dea3..29b3992 100644
--- a/keystore2/src/lib.rs
+++ b/keystore2/src/lib.rs
@@ -13,6 +13,7 @@
 // limitations under the License.
 
 //! This crate implements the Android Keystore 2.0 service.
+#![recursion_limit = "256"]
 
 pub mod apc;
 pub mod auth_token_handler;