diff --git a/src/widgets/widgets/qwidgetlinecontrol.cpp b/src/widgets/widgets/qwidgetlinecontrol.cpp
index 0ff55f7c3757788bce3c7bdf99e4a34cd2dbfd4b..9097ad01a86ca3b4f78019d69ae05475da46f2b2 100644
--- a/src/widgets/widgets/qwidgetlinecontrol.cpp
+++ b/src/widgets/widgets/qwidgetlinecontrol.cpp
@@ -112,7 +112,7 @@ void QWidgetLineControl::updateDisplayText(bool forceUpdate)
     // characters)
     QChar* uc = str.data();
     for (int i = 0; i < (int)str.length(); ++i) {
-        if ((uc[i] < 0x20 && uc[i] != 0x09)
+        if ((uc[i].unicode() < 0x20 && uc[i].unicode() != 0x09)
             || uc[i] == QChar::LineSeparator
             || uc[i] == QChar::ParagraphSeparator
             || uc[i] == QChar::ObjectReplacementCharacter)