diff --git a/src/plugins/debugger/qml/qmlengine.cpp b/src/plugins/debugger/qml/qmlengine.cpp
index c23d4b3d153..ba292f29b1a 100644
--- a/src/plugins/debugger/qml/qmlengine.cpp
+++ b/src/plugins/debugger/qml/qmlengine.cpp
@@ -109,7 +109,7 @@ enum StepAction
 
 struct QmlV8ObjectData
 {
-    int handle;
+    int handle = -1;
     QByteArray name;
     QByteArray type;
     QVariant value;