diff --git a/tools/compiler/src/processor.rs b/tools/compiler/src/processor.rs
index 81ec3f7..1879827 100644
--- a/tools/compiler/src/processor.rs
+++ b/tools/compiler/src/processor.rs
@@ -379,7 +379,7 @@ fn process_chain_config(chain_config: ChainConfig) -> AppResult<Registry> {
     let mut symbol_map: HashMap<String, Vec<String>> = HashMap::new();
 
     // Collect all symbols and their base denoms
-    for (_, metadata) in &registry.asset_by_id {
+    for metadata in registry.asset_by_id.values() {
         let symbol = extract_symbol(metadata)?;
         let base_denom = metadata.base_denom().denom.clone();
         symbol_map.entry(symbol).or_default().push(base_denom);
diff --git a/tools/compiler/tests/test_processor.rs b/tools/compiler/tests/test_processor.rs
index 2fb3739..a74710b 100644
--- a/tools/compiler/tests/test_processor.rs
+++ b/tools/compiler/tests/test_processor.rs
@@ -1,3 +1,5 @@
+use std::collections::HashMap;
+
 use penumbra_asset::asset::Metadata;
 use penumbra_registry::parser::IbcInput;
 use penumbra_registry::processor::{base64_id, transport_metadata_along_channel, Registry};
@@ -29,6 +31,7 @@ fn test_transport_metadata_along_channel() {
         cosmos_registry_dir: "love-124".to_string(),
         display_name: "Strangelove".to_string(),
         images: vec![],
+        symbol_overrides: HashMap::new(),
     };
 
     let input_json = r#"