diff --git a/src/core/positioning/positioning.h b/src/core/positioning/positioning.h
index 798bbc582a..6f537559db 100644
--- a/src/core/positioning/positioning.h
+++ b/src/core/positioning/positioning.h
@@ -281,7 +281,7 @@ class Positioning : public QObject
     QgsQuickCoordinateTransformer *mCoordinateTransformer = nullptr;
     QgsPoint mSourcePosition;
     QgsPoint mProjectedPosition;
-    double mProjectedHorizontalAccuracy;
+    double mProjectedHorizontalAccuracy = 0.0;
     virtual QList<QPair<QString, QVariant>> details() const { return {}; }
 
     bool mInternalPermissionChecked = false;