diff --git a/Orange/widgets/visualize/owheatmap.py b/Orange/widgets/visualize/owheatmap.py
index 862bde7635b..68d045af4a0 100644
--- a/Orange/widgets/visualize/owheatmap.py
+++ b/Orange/widgets/visualize/owheatmap.py
@@ -975,6 +975,7 @@ def setup_scene(self, parts, data):
             if rowitem.title:
                 title = QGraphicsSimpleTextItem(rowitem.title, widget)
                 item = GraphicsSimpleTextLayoutItem(title, parent=grid)
+                item.setSizePolicy(QSizePolicy.Preferred, QSizePolicy.Fixed)
                 grid.addItem(item, Row0 + i * 2, Col0)
 
             if rowitem.cluster: