diff --git a/modules/icing/pirep_goes.py b/modules/icing/pirep_goes.py
index 51b99f7c2ad18eca61443c3ada032d07704a534d..eb8e2e3985b1e42140dcb0e61816e806e9b394c4 100644
--- a/modules/icing/pirep_goes.py
+++ b/modules/icing/pirep_goes.py
@@ -650,7 +650,7 @@ def check_no_overlap(lon, lat, ts, grd_bins, t_delta=600.0):
 
 
 # This mostly reduces some categories for a degree of class balancing and removes no intensity reports
-def process(ice_dct, no_ice_dct, neg_ice_dct):
+def process(ice_dct, no_ice_dct, neg_ice_dct, t_delta=600):
     t_delta = 600  # seconds
 
     new_ice_dct = {}