diff --git a/src/gui/painting/qpainter.cpp b/src/gui/painting/qpainter.cpp
index 2a793a131e9..ed08162c1cb 100644
--- a/src/gui/painting/qpainter.cpp
+++ b/src/gui/painting/qpainter.cpp
@@ -6177,8 +6177,7 @@ static void drawTextItemDecoration(QPainter *painter, const QPointF &pos, const
     const qreal underlineOffset = fe->underlinePosition().toReal();
     // deliberately ceil the offset to avoid the underline coming too close to
     // the text above it.
-    const qreal aliasedCoordinateDelta = 0.5 - 0.015625;
-    const qreal underlinePos = pos.y() + qCeil(underlineOffset) - aliasedCoordinateDelta;
+    const qreal underlinePos = pos.y() + qCeil(underlineOffset);
 
     if (underlineStyle == QTextCharFormat::SpellCheckUnderline) {
         underlineStyle = QTextCharFormat::SpellCheckUnderline; // ### Qt5 QTextCharFormat::UnderlineStyle(QApplication::style()->styleHint(QStyle::SH_SpellCheckUnderlineStyle));
diff --git a/src/gui/text/qtextengine.cpp b/src/gui/text/qtextengine.cpp
index dbf1b457f6f..d1f168805a1 100644
--- a/src/gui/text/qtextengine.cpp
+++ b/src/gui/text/qtextengine.cpp
@@ -3046,7 +3046,7 @@ void QTextEngine::adjustUnderlines(ItemDecorationList::iterator start,
 {
     for (ItemDecorationList::iterator it = start; it != end; ++it) {
         it->y = underlinePos;
-        it->pen.setWidth(penWidth);
+        it->pen.setWidthF(penWidth);
     }
 }