diff --git a/protein_modification_qc.py b/protein_modification_qc.py
index 32004ef..8746bf7 100644
--- a/protein_modification_qc.py
+++ b/protein_modification_qc.py
@@ -95,7 +95,7 @@ def check_func(row, genome, allowed_mod_dict):
     with open('data/genome.pickle', 'rb') as ins:
         genome = pickle.load(ins)
 
-    data = pandas.read_csv('data/pombase-chado.modifications', sep='\t', na_filter=False)
+    data = pandas.read_csv('data/pombase-chado.modifications', sep='\t', na_filter=False, header=None)
     with open('data/allowed_mod_dict.json', 'r') as ins:
         allowed_mod_dict = json.load(ins)