diff --git a/src/api/TotalCircleController.php b/src/api/TotalCircleController.php
index ea61f9c..f38ec2c 100644
--- a/src/api/TotalCircleController.php
+++ b/src/api/TotalCircleController.php
@@ -30,7 +30,7 @@ public function handle(NovaRequest $request)
         $model = $request->input('model');
         $modelInstance = new $model;
         $tableName = $modelInstance->getConnection()->getTablePrefix() . $modelInstance->getTable();
-        $xAxisColumn = $request->input('col_xaxis') ?? DB::raw($tableName.'.created_at');
+        $xAxisColumn = $request->input('col_xaxis') ?? $tableName.'.created_at';
         $cacheKey = hash('md4', $model . (int)(bool)$request->input('expires'));
         $dataSet = Cache::get($cacheKey);
         if (!$dataSet) {
diff --git a/src/api/TotalRecordsController.php b/src/api/TotalRecordsController.php
index 428365a..1f7565e 100644
--- a/src/api/TotalRecordsController.php
+++ b/src/api/TotalRecordsController.php
@@ -39,7 +39,7 @@ public function handle(NovaRequest $request)
         $modelInstance = new $model;
         $connectionName = $modelInstance->getConnection()->getDriverName();
         $tableName = $modelInstance->getConnection()->getTablePrefix() . $modelInstance->getTable();
-        $xAxisColumn = $request->input('col_xaxis') ?? DB::raw($tableName.'.created_at');
+        $xAxisColumn = $request->input('col_xaxis') ?? $tableName.'.created_at';
         $cacheKey = hash('md4', $model . (int)(bool)$request->input('expires'));
         $dataSet = Cache::get($cacheKey);
         if (!$dataSet) {