diff --git a/service/prompt/prompt_build_service.go b/service/prompt/prompt_build_service.go
index f84dfd4..4fb896e 100644
--- a/service/prompt/prompt_build_service.go
+++ b/service/prompt/prompt_build_service.go
@@ -47,8 +47,11 @@ func buildStructTypeRequest(ctx context.Context, req *dto.ComposeMessagesReq, ch
 // compileToProviderRequest 编译为 Provider 请求
 func compileToProviderRequest(ctx context.Context, ir *IR, chatModel *gateway.AsynchModel, req *dto.ComposeMessagesReq, customPrompt ...string) (map[string]any, error) {
 	protocol, err := GetProtocolByProvider(ctx, chatModel.OperatorName)
-	if err != nil || protocol == nil {
-		return nil, fmt.Errorf("协议配置不存在或获取失败: %w", err)
+	if err != nil {
+		return nil, err
+	}
+	if protocol == nil {
+		return nil, fmt.Errorf("协议配置不存在或获取失败")
 	}
 	// 如果传了自定义提示词，替换掉协议模板
 	if len(customPrompt) > 0 && customPrompt[0] != "" {