diff --git a/.changeset/mean-penguins-type.md b/.changeset/mean-penguins-type.md
new file mode 100644
index 0000000000..e840e2dd05
--- /dev/null
+++ b/.changeset/mean-penguins-type.md
@@ -0,0 +1,5 @@
+---
+'graphql-executor': patch
+---
+
+preserve key order when promises resolves out of order
diff --git a/src/execution/executor.ts b/src/execution/executor.ts
index 91ef8075f7..e570d40baa 100644
--- a/src/execution/executor.ts
+++ b/src/execution/executor.ts
@@ -908,6 +908,8 @@ export class Executor {
 
       if (result !== undefined) {
         if (isPromise(result)) {
+          // set key to undefined to preserve key order
+          results[responseName] = undefined;
           const promise = result.then((resolved) => {
             results[responseName] = resolved;
           });