diff --git a/crates/circuit/src/circuit_data.rs b/crates/circuit/src/circuit_data.rs
index 07f4579a4cd3..3d1e45aac5c0 100644
--- a/crates/circuit/src/circuit_data.rs
+++ b/crates/circuit/src/circuit_data.rs
@@ -1104,13 +1104,7 @@ impl CircuitData {
         Ok(PySet::new_bound(py, self.param_table.uuid_map.values())?.unbind())
     }
 
-    pub fn pop_param(
-        &mut self,
-        py: Python,
-        uuid: u128,
-        name: String,
-        default: PyObject,
-    ) -> PyObject {
+    pub fn pop_param(&mut self, py: Python, uuid: u128, name: &str, default: PyObject) -> PyObject {
         match self.param_table.pop(uuid, name) {
             Some(res) => res.into_py(py),
             None => default.clone_ref(py),
diff --git a/crates/circuit/src/circuit_instruction.rs b/crates/circuit/src/circuit_instruction.rs
index 781a776c1566..81414b085fe9 100644
--- a/crates/circuit/src/circuit_instruction.rs
+++ b/crates/circuit/src/circuit_instruction.rs
@@ -778,7 +778,7 @@ pub(crate) fn operation_type_and_data_to_py(
             let kwargs = [
                 ("label", label.to_object(py)),
                 ("unit", unit.to_object(py)),
-                ("duration", duration.to_object(py)),
+                ("duration", duration.as_ref().to_object(py)),
             ]
             .into_py_dict_bound(py);
             let mut out = gate_class.call_bound(py, args, Some(&kwargs))?;
diff --git a/crates/circuit/src/parameter_table.rs b/crates/circuit/src/parameter_table.rs
index 48c779eed3a3..9e5b31245391 100644
--- a/crates/circuit/src/parameter_table.rs
+++ b/crates/circuit/src/parameter_table.rs
@@ -153,8 +153,8 @@ impl ParamTable {
         self.uuid_map.clear();
     }
 
-    pub fn pop(&mut self, key: u128, name: String) -> Option<ParamEntry> {
-        self.names.remove(&name);
+    pub fn pop(&mut self, key: u128, name: &str) -> Option<ParamEntry> {
+        self.names.remove(name);
         self.uuid_map.remove(&key);
         self.table.remove(&key)
     }