diff --git a/app/src/main/java/com/larkery/simpleorgsync/cal/CalSyncAdapter.java b/app/src/main/java/com/larkery/simpleorgsync/cal/CalSyncAdapter.java
index 2f53df2..9ca9fff 100644
--- a/app/src/main/java/com/larkery/simpleorgsync/cal/CalSyncAdapter.java
+++ b/app/src/main/java/com/larkery/simpleorgsync/cal/CalSyncAdapter.java
@@ -518,7 +518,7 @@ private void setHeadingFromQuery(Cursor query, Heading heading, Timestamp ts) {
         ts.setAllDay(query.getInt(EventsProjection.IS_ALL_DAY.ordinal()) == 1);
         final String rrule = query.getString(EventsProjection.RRULE.ordinal());
         ts.setRRule(rrule);
-        if (rrule.isEmpty()) {
+        if (rrule == null || rrule.isEmpty()) {
             ts.setEndTime(query.getLong(EventsProjection.END_TIME.ordinal()));
         } else {
             // have to do this after setting start time!