diff --git a/src/frontends/qt4/Qt2BC.cpp b/src/frontends/qt4/Qt2BC.cpp
index 289ac65de9..9653c892ac 100644
--- a/src/frontends/qt4/Qt2BC.cpp
+++ b/src/frontends/qt4/Qt2BC.cpp
@@ -152,7 +152,7 @@ bool CheckedLineEdit::check() const
 	else
 		setWarningColor(input_);
 
-	if (!label_) {
+	if (label_) {
 		if (valid)
 			label_->setPalette(QPalette());
 		else