diff --git a/src/meshlabplugins/edit_quality/eqhandle.cpp b/src/meshlabplugins/edit_quality/eqhandle.cpp
index 364d53bfc..ef3d4a2d5 100644
--- a/src/meshlabplugins/edit_quality/eqhandle.cpp
+++ b/src/meshlabplugins/edit_quality/eqhandle.cpp
@@ -83,7 +83,7 @@ void EqHandle::mouseMoveEvent(QGraphicsSceneMouseEvent *event)
 	setCursor(Qt::OpenHandCursor);
 
 	QPointF newPos = event->scenePos();
-	qreal handleOffset = abs(newPos.x()-pos().x());
+	qreal handleOffset = std::fabs(newPos.x()-pos().x());
 
 	if (handleOffset >= std::numeric_limits<float>::epsilon())
 	{