diff --git a/python/sdist/amici/petab_import.py b/python/sdist/amici/petab_import.py
index eee6ea3093..fe21b31547 100644
--- a/python/sdist/amici/petab_import.py
+++ b/python/sdist/amici/petab_import.py
@@ -12,7 +12,6 @@
 )
 
 from .petab.import_helpers import (  # noqa # pylint: disable=unused-import
-    get_fixed_parameters,
     get_observation_model,
     petab_noise_distributions_to_amici,
     petab_scale_to_amici_scale,
@@ -25,4 +24,7 @@
     import_model_sbml,
     import_petab_problem,
 )
+from .petab.sbml_import import (  # noqa
+    _get_fixed_parameters_sbml as get_fixed_parameters,
+)
 from .petab.sbml_import import species_to_parameters