diff --git a/bundles/org.eclipse.jface.text/src/org/eclipse/jface/text/source/LineNumberRulerColumn.java b/bundles/org.eclipse.jface.text/src/org/eclipse/jface/text/source/LineNumberRulerColumn.java
index 6bf9a3ca6d0..7eff2aee8f0 100644
--- a/bundles/org.eclipse.jface.text/src/org/eclipse/jface/text/source/LineNumberRulerColumn.java
+++ b/bundles/org.eclipse.jface.text/src/org/eclipse/jface/text/source/LineNumberRulerColumn.java
@@ -616,6 +616,8 @@ public void addMouseListener(MouseListener listener) {
 			fCachedTextWidget= null;
 		});
 
+		fCanvas.addListener(SWT.ZoomChanged, e -> computeIndentations());
+
 		fMouseHandler= new MouseHandler();
 		fCanvas.addMouseListener(fMouseHandler);
 		fCanvas.addMouseMoveListener(fMouseHandler);