diff --git a/src/plugins/projectexplorer/environmentaspectwidget.cpp b/src/plugins/projectexplorer/environmentaspectwidget.cpp
index 79ff5d61273..4234e8f63a9 100644
--- a/src/plugins/projectexplorer/environmentaspectwidget.cpp
+++ b/src/plugins/projectexplorer/environmentaspectwidget.cpp
@@ -48,6 +48,7 @@ namespace ProjectExplorer {
 EnvironmentAspectWidget::EnvironmentAspectWidget(EnvironmentAspect *aspect, QWidget *additionalWidget) :
     RunConfigWidget(),
     m_aspect(aspect),
+    m_ignoreChange(false),
     m_additionalWidget(additionalWidget)
 {
     QTC_CHECK(m_aspect);