diff --git a/OVMS.V3/components/ovms_location/src/ovms_location.cpp b/OVMS.V3/components/ovms_location/src/ovms_location.cpp
index 923d2d0..860834b 100644
--- a/OVMS.V3/components/ovms_location/src/ovms_location.cpp
+++ b/OVMS.V3/components/ovms_location/src/ovms_location.cpp
@@ -752,6 +752,8 @@ void OvmsLocations::UpdatedVehicleOn(OvmsMetric* metric)
 
 void OvmsLocations::UpdateParkPosition()
   {
+  OvmsRecMutexLock lock(&m_park_lock);
+  
   bool caron = StdMetrics.ms_v_env_on->AsBool();
   if (caron)
     {
@@ -843,6 +845,8 @@ void OvmsLocations::CheckTheft()
   {
   static int last_dist = 0;
 
+  OvmsRecMutexLock lock(&m_park_lock);
+
   if ((m_park_latitude == 0) && (m_park_longitude == 0)) return;
   if (StandardMetrics.ms_v_env_on->AsBool()) return;
 
diff --git a/OVMS.V3/components/ovms_location/src/ovms_location.h b/OVMS.V3/components/ovms_location/src/ovms_location.h
index 249822a..de00537 100644
--- a/OVMS.V3/components/ovms_location/src/ovms_location.h
+++ b/OVMS.V3/components/ovms_location/src/ovms_location.h
@@ -104,6 +104,7 @@ class OvmsLocations
     float m_park_longitude;
     float m_park_distance;
     bool m_park_invalid;
+    OvmsRecMutex m_park_lock;
     uint32_t m_last_alarm;
     LocationMap m_locations;