diff --git a/capnp-rpc/src/rpc.rs b/capnp-rpc/src/rpc.rs
index 29d900425..a4243d598 100644
--- a/capnp-rpc/src/rpc.rs
+++ b/capnp-rpc/src/rpc.rs
@@ -354,7 +354,7 @@ fn to_pipeline_ops(
 }
 
 fn from_error(error: &Error, mut builder: exception::Builder) {
-    builder.set_reason(&error.to_string());
+    builder.set_reason(error.to_string());
     let typ = match error.kind {
         ::capnp::ErrorKind::Failed => exception::Type::Failed,
         ::capnp::ErrorKind::Overloaded => exception::Type::Overloaded,