diff --git a/src/EnergyPlus/api/datatransfer.py b/src/EnergyPlus/api/datatransfer.py
index e2b8ee1c5f8..2ca5b9f47ab 100644
--- a/src/EnergyPlus/api/datatransfer.py
+++ b/src/EnergyPlus/api/datatransfer.py
@@ -1158,7 +1158,7 @@ def zone_time_step(self, state: c_void_p) -> float:
         :param state: An active EnergyPlus "state" that is returned from a call to `api.state_manager.new_state()`.
         :return: The current zone time step in fractional hours.
         """
-        return self.api.systemTimeStep(state)
+        return self.api.zoneTimeStep(state)
 
     def system_time_step(self, state: c_void_p) -> float:
         """