diff --git a/studyprocessor.py b/studyprocessor.py
index 5c94065..ce0e2d3 100644
--- a/studyprocessor.py
+++ b/studyprocessor.py
@@ -444,9 +444,9 @@ class StudyProcessor(Aggregator, HDF5Container):
     def _turb_power(self):
         turb_power = {}
         for run in self.runs:
-            dt = self.get_value("/series/rms_from_log/dt/{run}")
+            dt = self.get_value(f"/series/rms_from_log/dt/{run}")
             # Energy injected at each timestep
-            energy = self.get_value("/series/rms_from_log/turb_energy/{run}")
+            energy = self.get_value(f"/series/rms_from_log/turb_energy/{run}")
             # Power of the turbulence at this step in Watts
             turb_power[run] = energy / dt
         return turb_power