diff --git a/spark/src/main/spark-3.x/org/apache/comet/shims/ShimCometScanExec.scala b/spark/src/main/spark-3.x/org/apache/comet/shims/ShimCometScanExec.scala
index 18871b814..544a67385 100644
--- a/spark/src/main/spark-3.x/org/apache/comet/shims/ShimCometScanExec.scala
+++ b/spark/src/main/spark-3.x/org/apache/comet/shims/ShimCometScanExec.scala
@@ -69,6 +69,8 @@ trait ShimCometScanExec {
       readSchema: StructType,
       options: ParquetOptions): FileScanRDD =
     classOf[FileScanRDD].getDeclaredConstructors
+      // Prevent to pick up incorrect constructors from any custom Spark forks.
+      .filter(c => List(3, 5, 6).contains(c.getParameterCount()) )
       .map { c =>
         c.getParameterCount match {
           case 3 => c.newInstance(sparkSession, readFunction, filePartitions)