diff --git a/src/id.rs b/src/id.rs
index 3627adc1..ee376d1e 100644
--- a/src/id.rs
+++ b/src/id.rs
@@ -44,7 +44,7 @@ impl Id {
 
 impl Debug for Id {
     fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        write!(f, "Id({})", self.as_u32())
+        write!(f, "Id({:x})", self.as_u32())
     }
 }
 
diff --git a/src/ingredient.rs b/src/ingredient.rs
index 85594e86..886d4362 100644
--- a/src/ingredient.rs
+++ b/src/ingredient.rs
@@ -129,8 +129,8 @@ pub(crate) fn fmt_index(
     fmt: &mut fmt::Formatter<'_>,
 ) -> fmt::Result {
     if let Some(i) = id {
-        write!(fmt, "{}({})", debug_name, u32::from(i))
+        write!(fmt, "{debug_name}({i:?})")
     } else {
-        write!(fmt, "{}()", debug_name)
+        write!(fmt, "{debug_name}()")
     }
 }