diff --git a/src/main/java/org/broad/igv/ui/panel/ZoomSliderPanel.java b/src/main/java/org/broad/igv/ui/panel/ZoomSliderPanel.java
index 169c8e69b0..d75964f294 100644
--- a/src/main/java/org/broad/igv/ui/panel/ZoomSliderPanel.java
+++ b/src/main/java/org/broad/igv/ui/panel/ZoomSliderPanel.java
@@ -214,6 +214,7 @@ private void paintVisibilityThresholds(final Graphics2D transGraphics) {
                     .sorted()
                     .distinct()
                     .map(threshold -> this.getReferenceFrame().calculateZoom(0, threshold))
+                    .filter(z -> z > 1)
                     .toList();
 
             transGraphics.setColor(TRANSPARENT_BLUE);