diff --git a/cloudnetpy_qc/variables.py b/cloudnetpy_qc/variables.py
index e35ff52..5c4b3d9 100644
--- a/cloudnetpy_qc/variables.py
+++ b/cloudnetpy_qc/variables.py
@@ -591,7 +591,6 @@ def time_units(nc: netCDF4.Dataset) -> str:
         units="m s-1",
         standard_name="rainfall_rate",
         required=[
-            Product.CATEGORIZE,
             Product.DISDROMETER,
             Product.WEATHER_STATION,
             Product.RAIN_RADAR,