diff --git a/src/widgets/helper/ResizingTextEdit.cpp b/src/widgets/helper/ResizingTextEdit.cpp
index d0ed7a93..59e9f09e 100644
--- a/src/widgets/helper/ResizingTextEdit.cpp
+++ b/src/widgets/helper/ResizingTextEdit.cpp
@@ -291,8 +291,8 @@ void ResizingTextEdit::insertCompletion(const QString &completion)
     }
 
     QTextCursor tc = this->textCursor();
-    tc.movePosition(QTextCursor::PreviousCharacter, QTextCursor::KeepAnchor,
-                    prefixSize);
+    int completionStart = tc.position() - prefixSize;
+    tc.setPosition(completionStart, QTextCursor::KeepAnchor);
     tc.insertText(completion);
     this->setTextCursor(tc);
     this->updateGeometry();