diff --git a/src/java/davmail/caldav/CaldavConnection.java b/src/java/davmail/caldav/CaldavConnection.java
index 2fccd3e2..f7dc64f4 100644
--- a/src/java/davmail/caldav/CaldavConnection.java
+++ b/src/java/davmail/caldav/CaldavConnection.java
@@ -464,7 +464,7 @@ public class CaldavConnection extends AbstractConnection {
                 DavGatewayTray.switchIcon();
                 try {
                     String eventName = getEventFileNameFromPath(href);
-                    if (eventName == null) {
+                    if (eventName == null || eventName.isEmpty()) {
                         notFound.add(href);
                     } else if ("inbox".equals(eventName) || "calendar".equals(eventName)) {
                         // Sunbird: just ignore