diff --git a/spark/src/main/scala/org/apache/spark/sql/comet/CometLocalTableScanExec.scala b/spark/src/main/scala/org/apache/spark/sql/comet/CometLocalTableScanExec.scala
index 622168bcc9..df0f11baa6 100644
--- a/spark/src/main/scala/org/apache/spark/sql/comet/CometLocalTableScanExec.scala
+++ b/spark/src/main/scala/org/apache/spark/sql/comet/CometLocalTableScanExec.scala
@@ -27,12 +27,13 @@ import org.apache.spark.sql.comet.CometLocalTableScanExec.createMetricsIterator
 import org.apache.spark.sql.comet.execution.arrow.CometArrowConverters
 import org.apache.spark.sql.execution.{LeafExecNode, LocalTableScanExec}
 import org.apache.spark.sql.execution.metric.{SQLMetric, SQLMetrics}
+import org.apache.spark.sql.types.NullType
 import org.apache.spark.sql.vectorized.ColumnarBatch
 
 import com.google.common.base.Objects
 
 import org.apache.comet.{CometConf, ConfigEntry}
-import org.apache.comet.serde.OperatorOuterClass.Operator
+import org.apache.comet.serde.{Compatible, OperatorOuterClass, SupportLevel, Unsupported}
 import org.apache.comet.serde.operator.CometSink
 
 case class CometLocalTableScanExec(
@@ -112,7 +113,17 @@ object CometLocalTableScanExec extends CometSink[LocalTableScanExec] {
   override def enabledConfig: Option[ConfigEntry[Boolean]] = Some(
     CometConf.COMET_EXEC_LOCAL_TABLE_SCAN_ENABLED)
 
-  override def createExec(nativeOp: Operator, op: LocalTableScanExec): CometNativeExec = {
+  override def getSupportLevel(op: LocalTableScanExec): SupportLevel = {
+    if (op.output.exists(_.dataType == NullType)) {
+      Unsupported(Some("Unsupported data type: NullType"))
+    } else {
+      Compatible()
+    }
+  }
+
+  override def createExec(
+      nativeOp: OperatorOuterClass.Operator,
+      op: LocalTableScanExec): CometNativeExec = {
     CometScanWrapper(nativeOp, CometLocalTableScanExec(op, op.rows, op.output))
   }
 
diff --git a/spark/src/test/scala/org/apache/comet/exec/CometExecSuite.scala b/spark/src/test/scala/org/apache/comet/exec/CometExecSuite.scala
index 16601d056b..58d43f4aba 100644
--- a/spark/src/test/scala/org/apache/comet/exec/CometExecSuite.scala
+++ b/spark/src/test/scala/org/apache/comet/exec/CometExecSuite.scala
@@ -3882,6 +3882,12 @@ class CometExecSuite extends CometTestBase {
     }
   }
 
+  test("LocalTableScanExec with NullType aggregate falls back without crashing") {
+    withSQLConf(CometConf.COMET_EXEC_LOCAL_TABLE_SCAN_ENABLED.key -> "true") {
+      checkAnswer(sql("SELECT max(col) FROM VALUES (NULL), (NULL) AS t(col)"), Seq(Row(null)))
+    }
+  }
+
   test("SparkToColumnar with timestamps in non-UTC timezone") {
     withTempDir { dir =>
       val path = new java.io.File(dir, "data").getAbsolutePath