diff --git a/python/lsst/source/injection/utils/_consolidate_injected_deepCoadd_catalogs.py b/python/lsst/source/injection/utils/_consolidate_injected_deepCoadd_catalogs.py
index 2361c23..79656cf 100644
--- a/python/lsst/source/injection/utils/_consolidate_injected_deepCoadd_catalogs.py
+++ b/python/lsst/source/injection/utils/_consolidate_injected_deepCoadd_catalogs.py
@@ -413,9 +413,9 @@ def _make_multiband_catalog(
         for colname in multiband_catalog.columns:
             column = multiband_catalog[colname]
             if isinstance(column, MaskedColumn):
-                dtype = column.dtype
-                # Fill with nan if possible, otherwise the dtype's minimum
-                column.fill(np.nan if np.issubdtype(dtype, float) else np.ma.maximum_fill_value(column))
+                column._data[column.mask] = (
+                    np.nan if np.issubdtype(column.dtype, float) else np.ma.maximum_fill_value(column)
+                )
     return multiband_catalog