diff --git a/services/bao1x-hal-service/src/lib.rs b/services/bao1x-hal-service/src/lib.rs
index 8b4e248f1..2b2d9c0ae 100644
--- a/services/bao1x-hal-service/src/lib.rs
+++ b/services/bao1x-hal-service/src/lib.rs
@@ -1,11 +1,9 @@
 pub mod api;
-pub mod i2c_lib;
 pub mod trng;
 
 use core::sync::atomic::{AtomicU32, Ordering};
 
 use bao1x_api::*;
-pub use i2c_lib::*;
 use num_traits::*;
 static REFCOUNT: AtomicU32 = AtomicU32::new(0);
 
@@ -98,6 +96,14 @@ impl Hal {
         )
         .expect("Couldn't setup preemption state");
     }
+
+    pub fn wfi(&self) {
+        xous::send_message(
+            self.conn,
+            xous::Message::new_blocking_scalar(HalOpcode::Wfi.to_usize().unwrap(), 0, 0, 0, 0),
+        )
+        .expect("Couldn't setup preemption state");
+    }
 }
 
 impl UdmaGlobalConfig for UdmaGlobal {