diff --git a/vehicle_apis/multirotor_api/src/arducopter_api.cpp b/vehicle_apis/multirotor_api/src/arducopter_api.cpp
index d545a406..ed58b483 100644
--- a/vehicle_apis/multirotor_api/src/arducopter_api.cpp
+++ b/vehicle_apis/multirotor_api/src/arducopter_api.cpp
@@ -237,7 +237,7 @@ std::vector<float> ArduCopterApi::GetControlSignals(const std::string& actuator_
   }
 
   // std::lock_guard<std::mutex> guard(hil_controls_mutex_);
-  return std::vector<float>(control_outputs_[actuator_map_itr->second]);
+  return std::vector<float>(1, control_outputs_[actuator_map_itr->second]);
 }
 
 //---------------------------------------------------------------------------
@@ -859,4 +859,4 @@ void ArduCopterApi::NormalizeRotorControls() {
 }
 
 }  // namespace projectairsim
-}  // namespace microsoft
\ No newline at end of file
+}  // namespace microsoft