diff --git a/hermesv3_bu/sectors/point_source_sector.py b/hermesv3_bu/sectors/point_source_sector.py
index 2b7d1b010dd7aefd4d126d10f2506ff1ceb43f83..420c0817dba88af26854b2e1d490efe83ad57cef 100755
--- a/hermesv3_bu/sectors/point_source_sector.py
+++ b/hermesv3_bu/sectors/point_source_sector.py
@@ -200,6 +200,7 @@ class PointSourceSector(Sector):
             catalog_df = catalog_df.loc[catalog_df['AF'] != -1, :]
 
             if sector_list is not None:
+                catalog_df['SNAP'] = catalog_df['SNAP'].apply(lambda x: x.zfill(6))
                 catalog_df = catalog_df.loc[catalog_df['SNAP'].str[:2].isin(sector_list)]
             catalog_df.drop('SNAP', axis=1, inplace=True)
 
@@ -249,6 +250,7 @@ class PointSourceSector(Sector):
         catalog_df.drop('AF', axis=1, inplace=True)
 
         if sector_list is not None:
+            catalog_df['SNAP'] = catalog_df['SNAP'].apply(lambda x: x.zfill(6))
             catalog_df = catalog_df.loc[catalog_df['SNAP'].str[:2].isin(sector_list)]
         catalog_df.drop('SNAP', axis=1, inplace=True)