diff --git a/src/MissionManager/SimpleMissionItem.cc b/src/MissionManager/SimpleMissionItem.cc
index 10c16d9ce9496ac7e6f862b9a4d3ac1b0a0ad448..c1d31fde6f75328234bc116a8940b90ed5684f2a 100644
--- a/src/MissionManager/SimpleMissionItem.cc
+++ b/src/MissionManager/SimpleMissionItem.cc
@@ -316,7 +316,7 @@ bool SimpleMissionItem::load(const QJsonObject& json, int sequenceNumber, QStrin
                 return false;
             }
 
-            _altitudeMode = (AltitudeMode)json[_jsonAltitudeModeKey].toDouble();
+            _altitudeMode = (AltitudeMode)(int)json[_jsonAltitudeModeKey].toDouble();
             _altitudeFact.setRawValue(JsonHelper::possibleNaNJsonValue(json[_jsonAltitudeKey]));
             _amslAltAboveTerrainFact.setRawValue(JsonHelper::possibleNaNJsonValue(json[_jsonAltitudeKey]));
         } else {