diff --git a/phasediff_scores/phasediff_selection/source_selection.sh b/phasediff_scores/phasediff_selection/source_selection.sh
index c1d4b34c..de115c18 100644
--- a/phasediff_scores/phasediff_selection/source_selection.sh
+++ b/phasediff_scores/phasediff_selection/source_selection.sh
@@ -30,4 +30,4 @@ while read -r MS; do
 done <$MSLIST
 
 #RETURN SCORES
-singularity exec -B $BIND $SIMG python ${SCRIPT_DIR}/phasediff_output.py h5 phasediff_h5s/*.h5
+singularity exec -B $BIND $SIMG python ${SCRIPT_DIR}/phasediff_output.py --h5 phasediff_h5s/*.h5
diff --git a/source_selection/phasediff_output.py b/source_selection/phasediff_output.py
index 23e38c17..b555a076 100644
--- a/source_selection/phasediff_output.py
+++ b/source_selection/phasediff_output.py
@@ -219,7 +219,7 @@ def parse_args():
     """
 
     parser = ArgumentParser()
-    parser.add_argument('h5', nargs='+', help='selfcal phasediff solutions', default=None)
+    parser.add_argument('--h5', nargs='+', help='selfcal phasediff solutions', default=None)
     parser.add_argument('--station', help='for one specific station', default=None)
     parser.add_argument('--all_stations', action='store_true', help='for all stations specifically')
     return parser.parse_args()