diff --git a/CanUds.c b/CanUds.c
index d52107e..4c49d37 100644
--- a/CanUds.c
+++ b/CanUds.c
@@ -454,6 +454,7 @@ static uint16_t WriteDataByIdentifier_2E(tCanUds *env) {
 
             memcpy(uds_WriteDataByIdentifier_2E_com_CF[dataIdentifier_lo].data, &env->data->data[3], size);
 
+            setResponseErrorPending(env, UDS_WriteDataByIdentifier, UDS_error_requestCorrectlyReceived_ResponsePending);
             SaveToStorageFromStatusData(env->deviceStorage, &statusData.ecu);
             return 3;
         }
@@ -498,6 +499,7 @@ static uint16_t WriteDataByIdentifier_2E(tCanUds *env) {
 
             memcpy(uds_WriteDataByIdentifier_2E_com_F1[dataIdentifier_lo].data, &env->data->data[3], size);
 
+            setResponseErrorPending(env, UDS_WriteDataByIdentifier, UDS_error_requestCorrectlyReceived_ResponsePending);
             SaveToStorageFromStatusData(env->deviceStorage, &statusData.ecu);
             return 3;
         }