diff --git a/Cargo.toml b/Cargo.toml
index c45bdb7..a0298b2 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -55,3 +55,7 @@ features = ["integer", "rational", "float"]
 
 [profile.test]
 opt-level = 3
+
+[profile.perf]
+inherits = "release"
+debug = true
diff --git a/src/stv/mod.rs b/src/stv/mod.rs
index dc951c8..7371097 100644
--- a/src/stv/mod.rs
+++ b/src/stv/mod.rs
@@ -15,8 +15,6 @@
  *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-#![allow(mutable_borrow_reservation_conflict)]
-
 /// Gregory methods of surplus distributions
 pub mod gregory;
 /// Meek method of surplus distributions, etc.