diff --git a/orcasong/extractors/neutrino_chain.py b/orcasong/extractors/neutrino_chain.py
index 242251f25776a694bfe85f967fc7b66c2114f61d..7b74a19811df516cc387c5aeefccec4902bb12f6 100644
--- a/orcasong/extractors/neutrino_chain.py
+++ b/orcasong/extractors/neutrino_chain.py
@@ -518,9 +518,7 @@ def get_muon_mc_info_extr(input_file, inactive_du=None):
 
         primary_mc_track = blob["McTracks"][p]
 
-        particle_type = (
-            primary_mc_track.pdgid
-        )  # assumed that this is the same for all muons in a bundle, new: pdgid, old: type
+        particle_type = 13 # fixed for all muons
         is_cc = 0  # set to 0
         bjorkeny = 0  # set to zero