diff --git a/module/zfs/zfs_vnops.c b/module/zfs/zfs_vnops.c
index 9d8a9cbc5419..8b999a8b86d5 100644
--- a/module/zfs/zfs_vnops.c
+++ b/module/zfs/zfs_vnops.c
@@ -5262,6 +5262,6 @@ EXPORT_SYMBOL(zfs_map);
 /* CSTYLED */
 module_param(zfs_delete_blocks, ulong, 0644);
 MODULE_PARM_DESC(zfs_delete_blocks, "Delete files larger than N blocks async");
-module_param(zfs_read_chunk_size, long, 0644);
+module_param(zfs_read_chunk_size, ulong, 0644);
 MODULE_PARM_DESC(zfs_read_chunk_size, "Bytes to read per chunk");
 #endif