diff --git a/src/plugins/texteditor/basetexteditor.cpp b/src/plugins/texteditor/basetexteditor.cpp
index 323e03b02a3..a842ce94638 100644
--- a/src/plugins/texteditor/basetexteditor.cpp
+++ b/src/plugins/texteditor/basetexteditor.cpp
@@ -1415,6 +1415,9 @@ void BaseTextEditor::_q_requestAutoCompletion()
 {
     d->m_requestAutoCompletionTimer->stop();
 
+    if (CompletionSupport::instance()->isActive())
+        return;
+
     if (d->m_requestAutoCompletionRevision == document()->revision() &&
             d->m_requestAutoCompletionPosition == position())
         emit requestAutoCompletion(editableInterface(), false);
diff --git a/src/plugins/texteditor/completionsupport.cpp b/src/plugins/texteditor/completionsupport.cpp
index 1ae51b106b5..44dfad52199 100644
--- a/src/plugins/texteditor/completionsupport.cpp
+++ b/src/plugins/texteditor/completionsupport.cpp
@@ -93,6 +93,11 @@ void CompletionSupport::cleanupCompletions()
     }
 }
 
+bool CompletionSupport::isActive() const
+{
+    return m_completionList != 0;
+}
+
 void CompletionSupport::autoComplete(ITextEditable *editor, bool forced)
 {
     autoComplete_helper(editor, forced, /*quickFix = */ false);
diff --git a/src/plugins/texteditor/completionsupport.h b/src/plugins/texteditor/completionsupport.h
index 7403ed49005..6cf43cd6a91 100644
--- a/src/plugins/texteditor/completionsupport.h
+++ b/src/plugins/texteditor/completionsupport.h
@@ -55,6 +55,9 @@ public:
     CompletionSupport();
 
     static CompletionSupport *instance();
+
+    bool isActive() const;
+
 public slots:
     void autoComplete(TextEditor::ITextEditable *editor, bool forced);
     void quickFix(TextEditor::ITextEditable *editor);