diff --git a/rmgpy/molecule/fragment_utils.py b/rmgpy/molecule/fragment_utils.py
index 548671d519..ee759f0c84 100644
--- a/rmgpy/molecule/fragment_utils.py
+++ b/rmgpy/molecule/fragment_utils.py
@@ -548,7 +548,7 @@ def make_new_reaction_string(species_smiles, starting_fragment_smiles, frag_list
     return f"{species_smiles} + {starting_fragment_smiles} => {frag_list_str}"
 
 
-def generate_add_partial_reattachment_reactions(seed_dir, starting_fragments)
+def generate_add_partial_reattachment_reactions(seed_dir, starting_fragments):
     seed_reactions_filename = os.path.join(seed_dir, "reactions.py")
     seed_dictionary_filename = os.path.join(seed_dir, "dictionary.txt")
 
@@ -630,4 +630,4 @@ def generate_add_partial_reattachment_reactions(seed_dir, starting_fragments)
             f.writelines(seed_reaction_entries)
         return f"Added {len(seed_reaction_entries)} partial reattachment reactions to {seed_reactions_filename}."
     else:
-        return "No partial reattachment reactions to add"
\ No newline at end of file
+        return "No partial reattachment reactions to add"