diff --git a/services/drm_service/client/src/mediakeysystem_service_proxy.cpp b/services/drm_service/client/src/mediakeysystem_service_proxy.cpp
index 2c8c10e1..66c17493 100644
--- a/services/drm_service/client/src/mediakeysystem_service_proxy.cpp
+++ b/services/drm_service/client/src/mediakeysystem_service_proxy.cpp
@@ -62,7 +62,8 @@ int32_t MediaKeySystemServiceProxy::GenerateKeySystemRequest(std::vector<uint8_t
         DRM_ERR_LOG("MediaKeySystemServiceProxy::GenerateKeySystemRequest failed, ret: %{public}d", ret);
         return ret;
     }
-
+    
+    defaultUrl = reply.ReadString();
     uint32_t requestSize = reply.ReadInt32();
     DRM_CHECK_AND_RETURN_RET_LOG(requestSize < REQUEST_MAX_LEN, DRM_MEMORY_ERROR, "The size of request is too large.");
     if (requestSize != 0) {
@@ -73,8 +74,7 @@ int32_t MediaKeySystemServiceProxy::GenerateKeySystemRequest(std::vector<uint8_t
         }
         request.assign(requestBuf, requestBuf + requestSize);
     }
-    defaultUrl = reply.ReadString();
-
+    
     DRM_INFO_LOG("MediaKeySystemServiceProxy::GenerateKeySystemRequest exit.");
     return ret;
 }
diff --git a/services/drm_service/server/src/mediakeysystem_service_stub.cpp b/services/drm_service/server/src/mediakeysystem_service_stub.cpp
index 947cd3bc..2259f3ad 100644
--- a/services/drm_service/server/src/mediakeysystem_service_stub.cpp
+++ b/services/drm_service/server/src/mediakeysystem_service_stub.cpp
@@ -131,6 +131,10 @@ static int32_t ProcessKeySystemRequest(MediaKeySystemServiceStub *stub, MessageP
     std::string defaultUrl;
     int32_t ret = stub->GenerateKeySystemRequest(request, defaultUrl);
     DRM_CHECK_AND_RETURN_RET_LOG(ret == DRM_OK, ret, "ProcessKeySystemRequest faild, errCode:%{public}d", ret);
+    if (!reply.WriteString(defaultUrl)) {
+        DRM_ERR_LOG("MediaKeySystemServiceStub Write GenerateKeySystemRequest failed");
+        return IPC_STUB_WRITE_PARCEL_ERR;
+    }
     if (!reply.WriteInt32(request.size())) {
         DRM_ERR_LOG("MediaKeySystemServiceStub Write request size failed");
         return IPC_STUB_WRITE_PARCEL_ERR;
@@ -143,10 +147,6 @@ static int32_t ProcessKeySystemRequest(MediaKeySystemServiceStub *stub, MessageP
             return IPC_STUB_WRITE_PARCEL_ERR;
         }
     }
-    if (!reply.WriteString(defaultUrl)) {
-        DRM_ERR_LOG("MediaKeySystemServiceStub Write GenerateKeySystemRequest failed");
-        return IPC_STUB_WRITE_PARCEL_ERR;
-    }
     DRM_INFO_LOG("MediaKeySystemServiceStub MEDIA_KEY_SYSTEM_GENERATE_KEYSYSTEM_REQUEST exit.");
     return ret;
 }