diff --git a/lstchain/scripts/lstchain_r0_to_r0g.py b/lstchain/scripts/lstchain_r0_to_r0g.py
index 6614228e7f..11ccdbce9f 100644
--- a/lstchain/scripts/lstchain_r0_to_r0g.py
+++ b/lstchain/scripts/lstchain_r0_to_r0g.py
@@ -118,7 +118,7 @@ def main():
                     n_tiles=n_tiles,
                     rows_per_tile=rows_per_tile,
                     compression_block_size_kb=64*1024,
-                    defaul_compression="lst"))
+                    defaul_compression="zstd9"))
             stream.open(str(name))
 
             stream.move_to_new_table("DataStream")