diff --git a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/core/resources/EFSFileStorage.java b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/core/resources/EFSFileStorage.java
index e0db10a41bd..2242b83d727 100644
--- a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/core/resources/EFSFileStorage.java
+++ b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/core/resources/EFSFileStorage.java
@@ -117,4 +117,11 @@ public class EFSFileStorage extends PlatformObject implements IStorage {
 		return locationURI;
 	}
 
+	@Override
+	public boolean equals(Object obj) {
+		if (obj instanceof EFSFileStorage && locationURI != null) {
+			return locationURI.equals(((EFSFileStorage)obj).getLocationURI());
+		}
+		return false;
+	}
 }