diff --git a/src/cal_tools/agipdlib.py b/src/cal_tools/agipdlib.py
index 8bdbb48d44057f6343d01942f214621a9d1c11ea..c9ea8d5f50e2ac6d8114241f6d6f946c0c52ec2e 100644
--- a/src/cal_tools/agipdlib.py
+++ b/src/cal_tools/agipdlib.py
@@ -82,6 +82,9 @@ class AgipdCtrl:
             # about bucketing the rate for managing meta-data.
             return round(float(self.run_dc[rep_rate_src].as_single_value()), 1)
 
+    def _get_acq_rate_instr(self) -> Optional[float]:
+        """Get acquisition (repetition rate) from INSTRUMENT source."""
+
     def _get_acq_rate_instr(self) -> Optional[float]:
         """Get acquisition (repetition rate) from INSTRUMENT source."""