diff --git a/src/render/katerenderer.cpp b/src/render/katerenderer.cpp
--- a/src/render/katerenderer.cpp
+++ b/src/render/katerenderer.cpp
@@ -267,7 +267,7 @@
 {
     QPen penBackup(paint.pen());
     QPen pen(config()->tabMarkerColor());
-    pen.setWidthF(spaceWidth() / 3.5);
+    pen.setWidthF(spaceWidth()/2);
     pen.setCapStyle(Qt::RoundCap);
     paint.setPen(pen);
     paint.setRenderHint(QPainter::Antialiasing, true);