diff --git a/modelseedpy/biochem/modelseed_reaction.py b/modelseedpy/biochem/modelseed_reaction.py
index 36ca07b..273097b 100755
--- a/modelseedpy/biochem/modelseed_reaction.py
+++ b/modelseedpy/biochem/modelseed_reaction.py
@@ -134,6 +134,7 @@ def __init__(
         status=None,
         source=None,
         flags=None,
+        pathways=None
     ):
 
         super().__init__(rxn_id, name, subsystem, lower_bound, upper_bound)
@@ -165,6 +166,8 @@ def __init__(
         if flags:
             self.flags |= set(flags)
 
+        self.pathways = pathways
+
     @property
     def compound_ids(self):
         return None