diff --git a/plugins/system/display/widget.cpp b/plugins/system/display/widget.cpp
index 107a35c6da7b2bca8efdbddf4a54e7ad1613f9ed..bb24924db7a31cb6cc89e2f55566d520c7996d5b 100644
--- a/plugins/system/display/widget.cpp
+++ b/plugins/system/display/widget.cpp
@@ -213,7 +213,7 @@ void Widget::setConfig(const KScreen::ConfigPtr &config)
             connect(output.data(), &KScreen::Output::isEnabledChanged,
                 this, &Widget::slotOutputEnabledChanged);
             for (QMLOutput *mOutput: mScreen->outputs()) {
-                if (mOutput->outputPtr() = output) {
+                if (mOutput->outputPtr() == output) {
                     disconnect(mOutput, SIGNAL(clicked()),
                                this, SLOT(mOutputClicked())); //避免多次连接
                     connect(mOutput, SIGNAL(clicked()),
@@ -1197,7 +1197,7 @@ void Widget::outputAdded(const KScreen::OutputPtr &output, bool connectChanged)
         connect(output.data(), &KScreen::Output::isEnabledChanged,
                 this, &Widget::slotOutputEnabledChanged);
         for (QMLOutput *mOutput: mScreen->outputs()) {
-            if (mOutput->outputPtr() = output) {
+            if (mOutput->outputPtr() == output) {
                 disconnect(mOutput, SIGNAL(clicked()),
                            this, SLOT(mOutputClicked())); //避免多次连接
                 connect(mOutput, SIGNAL(clicked()),