diff --git a/crates/common/src/bootstrap_model/index/database_index/indexed_fields.rs b/crates/common/src/bootstrap_model/index/database_index/indexed_fields.rs
index e1e27dd4..6695f906 100644
--- a/crates/common/src/bootstrap_model/index/database_index/indexed_fields.rs
+++ b/crates/common/src/bootstrap_model/index/database_index/indexed_fields.rs
@@ -35,8 +35,8 @@ use crate::{
 pub struct IndexedFields(WithHeapSize<Vec<FieldPath>>);
 
 impl IndexedFields {
-    pub fn by_id() -> Self {
-        IndexedFields(vec![].into())
+    pub const fn by_id() -> Self {
+        IndexedFields(WithHeapSize::new_vec())
     }
 
     pub fn creation_time() -> Self {
diff --git a/crates/value/src/heap_size.rs b/crates/value/src/heap_size.rs
index 8d8aa68d..f6fef7ef 100644
--- a/crates/value/src/heap_size.rs
+++ b/crates/value/src/heap_size.rs
@@ -238,6 +238,15 @@ impl<T: HeapSize> From<Vec<T>> for WithHeapSize<Vec<T>> {
     }
 }
 
+impl<T: HeapSize> WithHeapSize<Vec<T>> {
+    pub const fn new_vec() -> Self {
+        Self {
+            inner: Vec::new(),
+            elements_heap_size: 0,
+        }
+    }
+}
+
 impl<T: HeapSize> From<WithHeapSize<Vec<T>>> for Vec<T> {
     fn from(value: WithHeapSize<Vec<T>>) -> Self {
         value.inner