diff --git a/interop/src/arkts/InteropTypes.sts b/interop/src/arkts/InteropTypes.sts
index 3f186390ca49765ee4c93f962a9aee682f32f3f9..a3a870f0e8f8e982b2ec171a3b2baa806d9ff3df 100644
--- a/interop/src/arkts/InteropTypes.sts
+++ b/interop/src/arkts/InteropTypes.sts
@@ -28,6 +28,7 @@ export type KFloat = float
 export type KPointer = long // look once again
 export type pointer = KPointer
 export type KNativePointer = KPointer
+export type KInteropReturnBuffer = byte[]
 
 export const nullptr: pointer = 0