diff --git a/MMM-GoogleCalendar.js b/MMM-GoogleCalendar.js
index 6669522..5a8c3bf 100644
--- a/MMM-GoogleCalendar.js
+++ b/MMM-GoogleCalendar.js
@@ -680,7 +680,7 @@ Module.register("MMM-GoogleCalendar", {
         event.today =
           event.startDate >= today &&
           event.startDate < today + 24 * 60 * 60 * 1000;
-        event.title = event.summary;
+        event.title = event.summary === undefined ? this.translate("PRIVATE_EVENT") : event.summary;
 
         /* if sliceMultiDayEvents is set to true, multiday events (events exceeding at least one midnight) are sliced into days,
          * otherwise, esp. in dateheaders mode it is not clear how long these events are.
diff --git a/translations/en.json b/translations/en.json
index 4dca96f..a234e6d 100644
--- a/translations/en.json
+++ b/translations/en.json
@@ -6,5 +6,6 @@
   "INVALID_CREDENTIALS_TYPE": "Invalid credentials.json format. Please ensure you are using 'Desktop application' credentials as per the setup guide (missing 'installed' key).",
   "ERROR_TOKEN_EXCHANGE": "Failed to exchange authorization code for token. Please try authorizing again or check server logs.",
   "ERROR_LOADING_CREDENTIALS": "Error loading credentials.json. Ensure the file exists in the module directory and has correct permissions.",
-  "ERROR_PARSING_CREDENTIALS": "Error parsing credentials.json. Please ensure the file is valid JSON."
+  "ERROR_PARSING_CREDENTIALS": "Error parsing credentials.json. Please ensure the file is valid JSON.",
+  "PRIVATE_EVENT": "Private Event"
 }