diff --git a/src/stcal/ramp_fitting/ols_cas22_fit.py b/src/stcal/ramp_fitting/ols_cas22_fit.py
new file mode 100644
index 00000000..05e03e8f
--- /dev/null
+++ b/src/stcal/ramp_fitting/ols_cas22_fit.py
@@ -0,0 +1,13 @@
+"""This module exists to keep the interfaces the same as before a refactoring."""
+import warnings
+
+from .ols_cas22 import fit_ramps as fit_ramps_casertano
+
+__all__ = ["fit_ramps_casertano"]
+
+warnings.warn(
+    "The module stcal.ramp_fitting.ols_cas22_fit is deprecated. "
+    "Please use stcal.ramp_fitting.ols_cas22 instead.",
+    DeprecationWarning,
+    stacklevel=2,
+)