2 files changed, 5 insertions, 5 deletions
diff --git a/packages/sol-doc/src/cli.ts b/packages/sol-doc/src/cli.ts
index 11e638785..a1847e868 100644
--- a/packages/sol-doc/src/cli.ts
+++ b/packages/sol-doc/src/cli.ts
@@ -30,7 +30,7 @@ const JSON_TAB_WIDTH = 4;
         '46f7e8c4d144d11a72ce5338458ea37b933500d7a65e740cbca6d16e350eaa48': 'FillResults',
         c22239cf0d29df1e6cf1be54f21692a8c0b3a48b9367540d4ffff4608b331ce9: 'OrderInfo',
         c21e9ff31a30941c22e1cb43752114bb467c34dea58947f98966c9030fc8e4a9: 'TraderInfo',
-        '07c2bddc165e0b5005e6244dd4a9771fa61c78c4f42abd687d57567b0768136c': 'MatchedFillResults',
+        '6de3264a1040e027d4bdd29c71e963028238ac4ef060541078a7aced44a4d46f': 'MatchedFillResults',
     };
     const solDoc = new SolDoc();
     const doc = await solDoc.generateSolDocAsync(argv.contractsDir, argv.contracts, customTypeHashToName);
diff --git a/packages/sol-doc/src/sol_doc.ts b/packages/sol-doc/src/sol_doc.ts
index 4b7cbe77c..eda767054 100644
--- a/packages/sol-doc/src/sol_doc.ts
+++ b/packages/sol-doc/src/sol_doc.ts
@@ -270,15 +270,15 @@ export class SolDoc {
         }
         return type;
     }
-    private _overwriteStructNames(customTypes: CustomType[], customTypeHashToName?: ObjectMap<string>): CustomType[] {
-        if (_.isUndefined(customTypeHashToName)) {
+    private _overwriteStructNames(customTypes: CustomType[]): CustomType[] {
+        if (_.isUndefined(this._customTypeHashToName)) {
             return customTypes;
         }
         const localCustomTypes = _.cloneDeep(customTypes);
-        _.each(localCustomTypes, customType => {
+        _.each(localCustomTypes, (customType, i) => {
             const hash = SolDoc._generateCustomTypeHash(customType);
             if (!_.isUndefined(this._customTypeHashToName) && !_.isUndefined(this._customTypeHashToName[hash])) {
-                customType.name = this._customTypeHashToName[hash];
+                localCustomTypes[i].name = this._customTypeHashToName[hash];
             }
         });
         return localCustomTypes;