diff --git a/plugins/compare/bundles/org.eclipse.papyrus.compare.diagram.ide.ui/src/org/eclipse/papyrus/compare/diagram/ide/ui/contentmergeviewer/PapyrusTreeContentMergeViewer.java b/plugins/compare/bundles/org.eclipse.papyrus.compare.diagram.ide.ui/src/org/eclipse/papyrus/compare/diagram/ide/ui/contentmergeviewer/PapyrusTreeContentMergeViewer.java
index 597e7a1..5c15245 100644
--- a/plugins/compare/bundles/org.eclipse.papyrus.compare.diagram.ide.ui/src/org/eclipse/papyrus/compare/diagram/ide/ui/contentmergeviewer/PapyrusTreeContentMergeViewer.java
+++ b/plugins/compare/bundles/org.eclipse.papyrus.compare.diagram.ide.ui/src/org/eclipse/papyrus/compare/diagram/ide/ui/contentmergeviewer/PapyrusTreeContentMergeViewer.java
@@ -195,6 +195,9 @@
 			leftContentComputations = null;
 			rightContentComputations = null;
 			cachedMapForSelection = null;
+		} else {
+			getLeftMergeViewer().refresh();
+			getRightMergeViewer().refresh();
 		}
 
 		IMergeViewerItem leftInitialItem = null;