diff --git a/src/shf_wrapper.py b/src/shf_wrapper.py
index 6216fd7..f7de003 100644
--- a/src/shf_wrapper.py
+++ b/src/shf_wrapper.py
@@ -25,7 +25,7 @@ from seismic_hazard_forecasting import main as shf
 def main(argv):
     parser = argparse.ArgumentParser()
 
-    parser.add_argument("catalog", help="Path to input file of type 'catalog'")
+    parser.add_argument("catalog_file", help="Path to input file of type 'catalog'")
     parser.add_argument("--mc_file", help="Path to input file of type 'mccalc_output'", type=str, default=None, required=False)
     parser.add_argument("--pdf_file", help="Path to input file of type 'PDF'", type=str, default=None, required=False)
     parser.add_argument("--m_file", help="Path to input file of type 'm'", type=str, default=None, required=False)