diff --git a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/TreeColumn.java b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/TreeColumn.java
index 0e66a543765..970c846ea7a 100644
--- a/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/TreeColumn.java	
+++ b/bundles/org.eclipse.swt/Eclipse SWT/win32/org/eclipse/swt/widgets/TreeColumn.java	
@@ -375,8 +375,8 @@ public void pack () {
 	int flags = OS.DT_CALCRECT | OS.DT_NOPREFIX;
 	char [] buffer = text.toCharArray ();
 	OS.DrawText (hDC, buffer, buffer.length, rect, flags);
-	int headerWidth = rect.right - rect.left + Tree.HEADER_MARGIN;
-	if (OS.IsAppThemed ()) headerWidth += Tree.HEADER_EXTRA;
+	int headerWidth = rect.right - rect.left + Win32DPIUtils.pointToPixel(Tree.HEADER_MARGIN, getZoom());
+	if (OS.IsAppThemed ()) headerWidth += Win32DPIUtils.pointToPixel(Tree.HEADER_EXTRA, getZoom());
 	if (image != null || parent.sortColumn == this) {
 		Image headerImage = null;
 		if (parent.sortColumn == this && parent.sortDirection != SWT.NONE) {