diff --git a/org.eclipse.jdt.ui/core refactoring/org/eclipse/jdt/internal/corext/refactoring/reorg/DeleteModifications.java b/org.eclipse.jdt.ui/core refactoring/org/eclipse/jdt/internal/corext/refactoring/reorg/DeleteModifications.java
index 84175e8..e3647f3 100644
--- a/org.eclipse.jdt.ui/core refactoring/org/eclipse/jdt/internal/corext/refactoring/reorg/DeleteModifications.java
+++ b/org.eclipse.jdt.ui/core refactoring/org/eclipse/jdt/internal/corext/refactoring/reorg/DeleteModifications.java
@@ -13,7 +13,9 @@
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Iterator;
+import java.util.LinkedHashSet;
 import java.util.List;
+import java.util.Set;
 
 import org.eclipse.core.runtime.CoreException;
 
@@ -53,11 +55,11 @@
 	 * <code>handlePackageFragmentDelete</code>. This is part of the
 	 * algorithm to check if a parent folder can be deleted.
 	 */
-	private List<IPackageFragment> fPackagesToDelete;
+	private Set<IPackageFragment> fPackagesToDelete;
 
 	public DeleteModifications() {
 		fDelete= new ArrayList<>();
-		fPackagesToDelete= new ArrayList<>();
+		fPackagesToDelete= new LinkedHashSet<>();
 	}
 
 	public void delete(IResource resource) {