diff --git a/src/aero/actuator/ActuatorParsingFAST.C b/src/aero/actuator/ActuatorParsingFAST.C
index a41ac37c92..45a62f3293 100644
--- a/src/aero/actuator/ActuatorParsingFAST.C
+++ b/src/aero/actuator/ActuatorParsingFAST.C
@@ -174,6 +174,9 @@ actuator_FAST_parse(const YAML::Node& y_node, const ActuatorMeta& actMeta)
     get_required(y_actuator, "n_every_checkpoint", *restartFreq);
     get_required(y_actuator, "dt_fast", fi.dtFAST);
 
+    // FIXME this needs to be defined. No idea how
+    fi.dtDriver = 0.0625;
+
     get_required(y_actuator, "t_max", fi.tMax);
 
     if (y_actuator["super_controller"]) {