diff --git a/core-api/src/main/java/com/optimizely/ab/Optimizely.java b/core-api/src/main/java/com/optimizely/ab/Optimizely.java
index 4f942ff69..6eead11c6 100644
--- a/core-api/src/main/java/com/optimizely/ab/Optimizely.java
+++ b/core-api/src/main/java/com/optimizely/ab/Optimizely.java
@@ -1303,6 +1303,8 @@ private OptimizelyDecision createOptimizelyDecision(
         ProjectConfig projectConfig
     ) {
         String userId = user.getUserId();
+        String experimentId = null;
+        String variationId = null;
 
         Boolean flagEnabled = false;
         if (flagDecision.variation != null) {
@@ -1336,6 +1338,8 @@ private OptimizelyDecision createOptimizelyDecision(
 
 
         Boolean decisionEventDispatched = false;
+        experimentId = flagDecision.experiment != null ? flagDecision.experiment.getId() : null;
+        variationId = flagDecision.variation != null ? flagDecision.variation.getId() : null;
 
         Map<String, Object> attributes = user.getAttributes();
         Map<String, ?> copiedAttributes = new HashMap<>(attributes);
@@ -1362,6 +1366,8 @@ private OptimizelyDecision createOptimizelyDecision(
             .withRuleKey(ruleKey)
             .withReasons(reasonsToReport)
             .withDecisionEventDispatched(decisionEventDispatched)
+            .withExperimentId(experimentId)
+            .withVariationId(variationId)
             .build();
         notificationCenter.send(decisionNotification);
 
diff --git a/core-api/src/main/java/com/optimizely/ab/notification/DecisionNotification.java b/core-api/src/main/java/com/optimizely/ab/notification/DecisionNotification.java
index d97e5bf40..ab3fdc03d 100644
--- a/core-api/src/main/java/com/optimizely/ab/notification/DecisionNotification.java
+++ b/core-api/src/main/java/com/optimizely/ab/notification/DecisionNotification.java
@@ -364,6 +364,8 @@ public static class FlagDecisionNotificationBuilder {
         public final static String RULE_KEY = "ruleKey";
         public final static String REASONS = "reasons";
         public final static String DECISION_EVENT_DISPATCHED = "decisionEventDispatched";
+        public final static String EXPERIMENT_ID = "experimentId";
+        public final static String VARIATION_ID = "variationId";
 
         private String flagKey;
         private Boolean enabled;
@@ -374,6 +376,8 @@ public static class FlagDecisionNotificationBuilder {
         private String ruleKey;
         private List<String> reasons;
         private Boolean decisionEventDispatched;
+        private String experimentId;
+        private String variationId;
 
         private Map<String, Object> decisionInfo;
 
@@ -422,6 +426,16 @@ public FlagDecisionNotificationBuilder withDecisionEventDispatched(Boolean dispa
             return this;
         }
 
+        public FlagDecisionNotificationBuilder withExperimentId(String experimentId) {
+            this.experimentId = experimentId;
+            return this;
+        }
+
+        public FlagDecisionNotificationBuilder withVariationId(String variationId) {
+            this.variationId = variationId;
+            return this;
+        }
+
         public DecisionNotification build() {
             if (flagKey == null) {
                 throw new OptimizelyRuntimeException("flagKey not set");
@@ -439,6 +453,8 @@ public DecisionNotification build() {
                 put(RULE_KEY, ruleKey);
                 put(REASONS, reasons);
                 put(DECISION_EVENT_DISPATCHED, decisionEventDispatched);
+                put(EXPERIMENT_ID, experimentId);
+                put(VARIATION_ID, variationId);
             }};
 
             return new DecisionNotification(
diff --git a/core-api/src/test/java/com/optimizely/ab/OptimizelyUserContextTest.java b/core-api/src/test/java/com/optimizely/ab/OptimizelyUserContextTest.java
index 34cf61543..bb2d36192 100644
--- a/core-api/src/test/java/com/optimizely/ab/OptimizelyUserContextTest.java
+++ b/core-api/src/test/java/com/optimizely/ab/OptimizelyUserContextTest.java
@@ -707,6 +707,8 @@ public void decisionNotification() {
         OptimizelyJSON variables = optimizely.getAllFeatureVariables(flagKey, userId);
         String ruleKey = "exp_no_audience";
         List<String> reasons = Collections.emptyList();
+        String experimentId = "10420810910";
+        String variationId = "10418551353";
 
         final Map<String, Object> testDecisionInfoMap = new HashMap<>();
         testDecisionInfoMap.put(FLAG_KEY, flagKey);
@@ -715,6 +717,8 @@ public void decisionNotification() {
         testDecisionInfoMap.put(VARIABLES, variables.toMap());
         testDecisionInfoMap.put(RULE_KEY, ruleKey);
         testDecisionInfoMap.put(REASONS, reasons);
+        testDecisionInfoMap.put(EXPERIMENT_ID, experimentId);
+        testDecisionInfoMap.put(VARIATION_ID, variationId);
 
         Map<String, Object> attributes = Collections.singletonMap("gender", "f");
         OptimizelyUserContext user = optimizely.createUserContext(userId, attributes);