diff --git a/hap_csv_upload.py b/hap_csv_upload.py
index 88f4f0d..9e7e710 100644
--- a/hap_csv_upload.py
+++ b/hap_csv_upload.py
@@ -126,7 +126,7 @@ def main():
         if not matches:
             print('Invalid ticker id in file')
             return
-        year_code = matches.group(3)[:-1]
+        year_code = matches.group(3)[-1]
         month_code = get_month_code(int(matches.group(2)))
 
         out_ticker = base + month_code + year_code