diff --git a/python/ngen_cal/src/ngen/cal/ngen_hooks/ngen_output.py b/python/ngen_cal/src/ngen/cal/ngen_hooks/ngen_output.py
index 808054b1..40344d64 100644
--- a/python/ngen_cal/src/ngen/cal/ngen_hooks/ngen_output.py
+++ b/python/ngen_cal/src/ngen/cal/ngen_hooks/ngen_output.py
@@ -24,6 +24,7 @@ def __init__(self, filepath: Path) -> None:
         self._output_file = filepath
         self._ngen_realization: NgenRealization | None = None
 
+    @hookimpl
     def ngen_cal_model_configure(self, config: ModelExec) -> None:
         # avoid circular import
         from ngen.cal.ngen import NgenBase