diff --git a/packages/openapi-ts/src/plugins/@hey-api/client-angular/bundle/client.ts b/packages/openapi-ts/src/plugins/@hey-api/client-angular/bundle/client.ts
index b74f3ecbd3..9672894075 100644
--- a/packages/openapi-ts/src/plugins/@hey-api/client-angular/bundle/client.ts
+++ b/packages/openapi-ts/src/plugins/@hey-api/client-angular/bundle/client.ts
@@ -106,7 +106,10 @@ export const createClient = (config: Config = {}): Client => {
     }
 
     if (opts.requestValidator) {
-      await opts.requestValidator(opts);
+      await opts.requestValidator({
+        ...opts,
+        headers: Object.fromEntries(opts.headers.entries()),
+      });
     }
 
     return { opts, req, url };
diff --git a/packages/openapi-ts/src/plugins/@hey-api/client-fetch/bundle/client.ts b/packages/openapi-ts/src/plugins/@hey-api/client-fetch/bundle/client.ts
index bace63aa07..39ed22ec34 100644
--- a/packages/openapi-ts/src/plugins/@hey-api/client-fetch/bundle/client.ts
+++ b/packages/openapi-ts/src/plugins/@hey-api/client-fetch/bundle/client.ts
@@ -46,7 +46,10 @@ export const createClient = (config: Config = {}): Client => {
     }
 
     if (opts.requestValidator) {
-      await opts.requestValidator(opts);
+      await opts.requestValidator({
+        ...opts,
+        headers: Object.fromEntries(opts.headers.entries()),
+      });
     }
 
     if (opts.body !== undefined && opts.bodySerializer) {
diff --git a/packages/openapi-ts/src/plugins/@hey-api/client-ky/bundle/client.ts b/packages/openapi-ts/src/plugins/@hey-api/client-ky/bundle/client.ts
index 9f280d2aaa..d1c383722a 100644
--- a/packages/openapi-ts/src/plugins/@hey-api/client-ky/bundle/client.ts
+++ b/packages/openapi-ts/src/plugins/@hey-api/client-ky/bundle/client.ts
@@ -45,7 +45,10 @@ export const createClient = (config: Config = {}): Client => {
     }
 
     if (opts.requestValidator) {
-      await opts.requestValidator(opts);
+      await opts.requestValidator({
+        ...opts,
+        headers: Object.fromEntries(opts.headers.entries()),
+      });
     }
 
     if (opts.body !== undefined && opts.bodySerializer) {
diff --git a/packages/openapi-ts/src/plugins/@hey-api/client-next/bundle/client.ts b/packages/openapi-ts/src/plugins/@hey-api/client-next/bundle/client.ts
index 4e76ab03de..2af534c795 100644
--- a/packages/openapi-ts/src/plugins/@hey-api/client-next/bundle/client.ts
+++ b/packages/openapi-ts/src/plugins/@hey-api/client-next/bundle/client.ts
@@ -46,7 +46,10 @@ export const createClient = (config: Config = {}): Client => {
     }
 
     if (opts.requestValidator) {
-      await opts.requestValidator(opts);
+      await opts.requestValidator({
+        ...opts,
+        headers: Object.fromEntries(opts.headers.entries()),
+      });
     }
 
     if (opts.body !== undefined && opts.bodySerializer) {
diff --git a/packages/openapi-ts/src/plugins/@hey-api/client-nuxt/bundle/client.ts b/packages/openapi-ts/src/plugins/@hey-api/client-nuxt/bundle/client.ts
index 44e34f2888..8179128c17 100644
--- a/packages/openapi-ts/src/plugins/@hey-api/client-nuxt/bundle/client.ts
+++ b/packages/openapi-ts/src/plugins/@hey-api/client-nuxt/bundle/client.ts
@@ -45,7 +45,10 @@ export const createClient = (config: Config = {}): Client => {
     }
 
     if (opts.requestValidator) {
-      await opts.requestValidator(opts);
+      await opts.requestValidator({
+        ...opts,
+        headers: Object.fromEntries(opts.headers.entries()),
+      });
     }
 
     const url = buildUrl(opts);
diff --git a/packages/openapi-ts/src/plugins/@hey-api/client-ofetch/bundle/client.ts b/packages/openapi-ts/src/plugins/@hey-api/client-ofetch/bundle/client.ts
index 5f4e2e3270..ac6bece17e 100644
--- a/packages/openapi-ts/src/plugins/@hey-api/client-ofetch/bundle/client.ts
+++ b/packages/openapi-ts/src/plugins/@hey-api/client-ofetch/bundle/client.ts
@@ -54,7 +54,10 @@ export const createClient = (config: Config = {}): Client => {
     }
 
     if (opts.requestValidator) {
-      await opts.requestValidator(opts);
+      await opts.requestValidator({
+        ...opts,
+        headers: Object.fromEntries(opts.headers.entries()),
+      });
     }
 
     if (opts.body !== undefined && opts.bodySerializer) {