diff --git a/src/Types/globals.d.ts b/src/Types/globals.d.ts
index cea3d2f7..00e7295f 100644
--- a/src/Types/globals.d.ts
+++ b/src/Types/globals.d.ts
@@ -1,6 +1,7 @@
 declare global {
 	interface RequestInit {
 		dispatcher?: any
+		duplex?: 'half' | 'full'
 	}
 }
 
diff --git a/src/Utils/messages-media.ts b/src/Utils/messages-media.ts
index 6adb4b48..b071c512 100644
--- a/src/Utils/messages-media.ts
+++ b/src/Utils/messages-media.ts
@@ -674,6 +674,7 @@ export const getWAUploadToServer = (
 						'Content-Type': 'application/octet-stream',
 						Origin: DEFAULT_ORIGIN
 					},
+					duplex: 'half',
 					// Note: custom agents/proxy require undici Agent; omitted here.
 					signal: timeoutMs ? AbortSignal.timeout(timeoutMs) : undefined
 				})