diff --git a/package-lock.json b/package-lock.json
index 4b2ceddd..a75c240c 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "rescript-struct",
-  "version": "0.12.0",
+  "version": "0.12.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 0c0e41f4..69a4c027 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "rescript-struct",
-  "version": "0.12.0",
+  "version": "0.12.1",
   "description": "A simple and composable way to describe relationship between JavaScript and ReScript structures",
   "keywords": [
     "ReScript",
diff --git a/src/S.res b/src/S.res
index de87cf63..b693492a 100644
--- a/src/S.res
+++ b/src/S.res
@@ -864,7 +864,7 @@ module MakeMetadata = (
     ignore(key)
     ignore(value)
     %raw(`{
-      ...obj,
+      ...dict,
       [key]: value,
     }`)
   }