diff --git a/src/plugins/qmlprojectmanager/qmlprojectrunconfiguration.cpp b/src/plugins/qmlprojectmanager/qmlprojectrunconfiguration.cpp
index 5a51a0cea3c..fff164066f0 100644
--- a/src/plugins/qmlprojectmanager/qmlprojectrunconfiguration.cpp
+++ b/src/plugins/qmlprojectmanager/qmlprojectrunconfiguration.cpp
@@ -336,11 +336,13 @@ void QmlProjectRunConfiguration::onViewerArgsChanged()
 void QmlProjectRunConfiguration::useCppDebuggerToggled(bool toggled)
 {
     setUseCppDebugger(toggled);
+    updateEnabled();
 }
 
 void QmlProjectRunConfiguration::useQmlDebuggerToggled(bool toggled)
 {
     setUseQmlDebugger(toggled);
+    updateEnabled();
 }
 
 void QmlProjectRunConfiguration::qmlDebugServerPortChanged(uint port)