diff --git a/smack-core/src/main/java/org/jivesoftware/smack/SmackReactor.java b/smack-core/src/main/java/org/jivesoftware/smack/SmackReactor.java
index 443785dba..29e2254a6 100644
--- a/smack-core/src/main/java/org/jivesoftware/smack/SmackReactor.java
+++ b/smack-core/src/main/java/org/jivesoftware/smack/SmackReactor.java
@@ -150,6 +150,7 @@ public class SmackReactor {
         Date releaseTimeDate = new Date(releaseTimeEpoch);
         ScheduledAction scheduledAction = new ScheduledAction(runnable, releaseTimeDate, this);
         scheduledActions.add(scheduledAction);
+        selector.wakeup();
         return scheduledAction;
     }