diff --git a/qad_widgets/qcodeedit.cpp b/qad_widgets/qcodeedit.cpp
index b17696a..d97b096 100644
--- a/qad_widgets/qcodeedit.cpp
+++ b/qad_widgets/qcodeedit.cpp
@@ -165,6 +165,13 @@ QChar QCodeEdit::pairChar(QChar c) {
 
 
 bool QCodeEdit::eventFilter(QObject * o, QEvent * e) {
+	if (e->type() == QEvent::Destroy) {
+		completer.removeEventFilter(this);
+		textCode->removeEventFilter(this);
+		textCode->viewport()->removeEventFilter(this);
+		textLines->viewport()->removeEventFilter(this);
+		return QWidget::eventFilter(o, e);
+	}
 	if (textLines) {
 		if (o == textLines->viewport()) {
 			if (e->type() == QEvent::MouseButtonPress || e->type() == QEvent::MouseButtonRelease ||