diff --git a/barrOs_library.py b/barrOs_library.py
index b4086fa19a8c98ab930742846982d277e0413de2..1cf84233171571aca4cba66d09fbc0df90324ca6 100644
--- a/barrOs_library.py
+++ b/barrOs_library.py
@@ -2350,7 +2350,7 @@ def run_barros(arguments, offset = 1, step = 2, local_angle_threshold = 25, max_
             pdb_file = pdbID
             chains_inpdb = get_chains_in_pdb(pdb_file, source_pdb=False)[0]
 
-            if len(chain_inpdb) > 0:
+            if len(chains_inpdb) > 0:
                 try:
                     pdbID, chainID = pdb_file[:-4].split('/')[-1].split('_')
                 except: