diff --git a/ctru-rs/src/services/ir_user.rs b/ctru-rs/src/services/ir_user.rs
index 4386bd0..672fe20 100644
--- a/ctru-rs/src/services/ir_user.rs
+++ b/ctru-rs/src/services/ir_user.rs
@@ -340,7 +340,7 @@ impl IrUser {
 
     /// Internal helper for calling ir:USER service methods.
     unsafe fn send_service_request(
-        &mut self,
+        &self,
         request: Vec<u32>,
         expected_response_len: usize,
     ) -> crate::Result<Vec<u32>> {