diff --git a/crates/compiler/late_solve/src/storage.rs b/crates/compiler/late_solve/src/storage.rs
index 5c501a40ee..3aa6b31595 100644
--- a/crates/compiler/late_solve/src/storage.rs
+++ b/crates/compiler/late_solve/src/storage.rs
@@ -20,7 +20,7 @@ impl ExternalModuleStorage {
     pub fn new(subs: Subs) -> Self {
         Self {
             storage: StorageSubs::new(subs),
-            variable_mapping_cache: VariableMapCache::new(),
+            variable_mapping_cache: VariableMapCache::default(),
         }
     }
 
diff --git a/crates/compiler/types/src/subs.rs b/crates/compiler/types/src/subs.rs
index c2b6b23170..607a98ba82 100644
--- a/crates/compiler/types/src/subs.rs
+++ b/crates/compiler/types/src/subs.rs
@@ -4017,11 +4017,13 @@ struct StorageSubsOffsets {
 #[derive(Clone, Debug)]
 pub struct VariableMapCache(pub Vec<FnvMap<Variable, Variable>>);
 
-impl VariableMapCache {
-    pub fn new() -> Self {
+impl Default for VariableMapCache {
+    fn default() -> Self {
         Self(vec![Default::default()])
     }
+}
 
+impl VariableMapCache {
     fn get(&self, v: &Variable) -> Option<&Variable> {
         self.0.iter().rev().find_map(|cache| cache.get(v))
     }
@@ -4050,7 +4052,7 @@ impl StorageSubs {
 
     pub fn extend_with_variable(&mut self, source: &Subs, variable: Variable) -> Variable {
         storage_copy_var_to(
-            &mut VariableMapCache::new(),
+            &mut VariableMapCache::default(),
             source,
             &mut self.subs,
             variable,