diff --git a/decoder.py b/decoder.py
index f5444c2..f47397c 100644
--- a/decoder.py
+++ b/decoder.py
@@ -4,8 +4,6 @@ import polars as pl
 def get_j1939_mask() -> pl.Expr:
     """
     Returns a Polars expression representing the J1939 filtering rules.
-    Updated to include all 29-bit extended frames, including proprietary ones
-    (which have the Data Page bit set to 1) and CAN FD frames.
     """
     id_int = pl.col("ID").str.to_integer(base=16).cast(pl.UInt32)
     return id_int > 0x7FF