diff --git a/sdks/java/extensions/euphoria/euphoria-core/src/main/java/cz/seznam/euphoria/core/client/dataset/windowing/Session.java b/sdks/java/extensions/euphoria/euphoria-core/src/main/java/cz/seznam/euphoria/core/client/dataset/windowing/Session.java
index 78d8c03d552d..c2ffdf8dbc37 100644
--- a/sdks/java/extensions/euphoria/euphoria-core/src/main/java/cz/seznam/euphoria/core/client/dataset/windowing/Session.java
+++ b/sdks/java/extensions/euphoria/euphoria-core/src/main/java/cz/seznam/euphoria/core/client/dataset/windowing/Session.java
@@ -15,6 +15,7 @@
  */
 package cz.seznam.euphoria.core.client.dataset.windowing;
 
+import cz.seznam.euphoria.core.annotation.stability.Experimental;
 import cz.seznam.euphoria.core.client.triggers.AfterFirstCompositeTrigger;
 import cz.seznam.euphoria.core.client.triggers.PeriodicTimeTrigger;
 import cz.seznam.euphoria.core.client.triggers.TimeTrigger;
@@ -59,6 +60,7 @@ private Session(long gapDurationMillis) {
    *
    * @return this instance (for method chaining purposes)
    */
+  @Experimental("https://github.com/seznam/euphoria/issues/43")
   @SuppressWarnings("unchecked")
   public <T> Session<T> earlyTriggering(Duration timeout) {
     this.earlyTriggeringPeriod = Objects.requireNonNull(timeout);