diff --git a/dmserver/src/screen_rotation_controller.cpp b/dmserver/src/screen_rotation_controller.cpp
index 03d68c40..c6dc1f4c 100644
--- a/dmserver/src/screen_rotation_controller.cpp
+++ b/dmserver/src/screen_rotation_controller.cpp
@@ -413,6 +413,9 @@ SensorRotation ScreenRotationController::CalcSensorRotation(int sensorDegree)
 
 DeviceRotation ScreenRotationController::ConvertSensorToDeviceRotation(SensorRotation sensorRotation)
 {
+    if (sensorToDeviceRotationMap_.empty()) {
+        ProcessRotationMapping();
+    }
     return sensorToDeviceRotationMap_.at(sensorRotation);
 }
 
@@ -421,6 +424,9 @@ Rotation ScreenRotationController::ConvertDeviceToDisplayRotation(DeviceRotation
     if (deviceRotation == DeviceRotation::INVALID) {
         return GetCurrentDisplayRotation();
     }
+    if (deviceToDisplayRotationMap_.empty()) {
+        ProcessRotationMapping();
+    }
     return deviceToDisplayRotationMap_.at(deviceRotation);
 }