diff --git a/src/expr/literal.rs b/src/expr/literal.rs
index bce987f76..1ed1857fe 100644
--- a/src/expr/literal.rs
+++ b/src/expr/literal.rs
@@ -138,10 +138,7 @@ impl PyLiteral {
     pub fn value_interval_day_time(&self) -> PyResult<Option<(i32, i32)>> {
         match &self.value {
             ScalarValue::IntervalDayTime(Some(iv)) => {
-                let interval = *iv as u64;
-                let days = (interval >> 32) as i32;
-                let ms = interval as i32;
-                Ok(Some((days, ms)))
+                Ok(Some((iv.days, iv.milliseconds)))
             }
             ScalarValue::IntervalDayTime(None) => Ok(None),
             other => Err(unexpected_literal_value(other)),