diff --git a/common/src/main/scala/org/apache/comet/CometConf.scala b/common/src/main/scala/org/apache/comet/CometConf.scala
index ebf65392e..fabdd30c4 100644
--- a/common/src/main/scala/org/apache/comet/CometConf.scala
+++ b/common/src/main/scala/org/apache/comet/CometConf.scala
@@ -75,7 +75,7 @@ object CometConf extends ShimCometConf {
         "that to enable native vectorized execution, both this config and " +
         "'spark.comet.exec.enabled' need to be enabled.")
     .booleanConf
-    .createWithDefault(true)
+    .createWithDefault(false)
 
   val COMET_FULL_NATIVE_SCAN_ENABLED: ConfigEntry[Boolean] = conf(
     "spark.comet.native.scan.enabled")
@@ -85,7 +85,7 @@ object CometConf extends ShimCometConf {
         "read supported data sources (currently only Parquet is supported natively)." +
         " By default, this config is true.")
     .booleanConf
-    .createWithDefault(false)
+    .createWithDefault(true)
 
   val COMET_NATIVE_RECORDBATCH_READER_ENABLED: ConfigEntry[Boolean] = conf(
     "spark.comet.native.arrow.scan.enabled")