diff --git a/src/plugins/marketplace/qtmarketplacewelcomepage.cpp b/src/plugins/marketplace/qtmarketplacewelcomepage.cpp
index 1abb06dacc9..bd1c112a56a 100644
--- a/src/plugins/marketplace/qtmarketplacewelcomepage.cpp
+++ b/src/plugins/marketplace/qtmarketplacewelcomepage.cpp
@@ -132,8 +132,9 @@ public:
 
     void onTagClicked(const QString &tag)
     {
-        QString text = m_searcher->text();
-        m_searcher->setText(text + QString("tag:\"%1\" ").arg(tag));
+        const QString text = m_searcher->text();
+        m_searcher->setText((text.startsWith("tag:\"") ? text.trimmed() + " " : QString())
+                            + QString("tag:\"%1\" ").arg(tag));
     }
 
 private:
diff --git a/src/plugins/qtsupport/gettingstartedwelcomepage.cpp b/src/plugins/qtsupport/gettingstartedwelcomepage.cpp
index 93b630c3eb2..e163165f962 100644
--- a/src/plugins/qtsupport/gettingstartedwelcomepage.cpp
+++ b/src/plugins/qtsupport/gettingstartedwelcomepage.cpp
@@ -326,8 +326,9 @@ public:
 
     void onTagClicked(const QString &tag)
     {
-        QString text = m_searcher->text();
-        m_searcher->setText(text + QString("tag:\"%1\" ").arg(tag));
+        const QString text = m_searcher->text();
+        m_searcher->setText((text.startsWith("tag:\"") ? text.trimmed() + " " : QString())
+                            + QString("tag:\"%1\" ").arg(tag));
     }
 
     const bool m_isExamples;