1 files changed, 2 insertions, 2 deletions
diff --git a/sonar-plugin-api/src/main/java/org/sonar/api/notifications/Notification.java b/sonar-plugin-api/src/main/java/org/sonar/api/notifications/Notification.java
index 0666e7260f1..42eca231134 100644
--- a/sonar-plugin-api/src/main/java/org/sonar/api/notifications/Notification.java
+++ b/sonar-plugin-api/src/main/java/org/sonar/api/notifications/Notification.java
@@ -121,8 +121,8 @@ public class Notification implements Serializable {
   }
 
   @Override
-  public boolean equals(Object obj) {
-    if (!(obj instanceof Notification)) {
+  public boolean equals(@Nullable Object obj) {
+    if (obj == null || this.getClass() != obj.getClass()) {
       return false;
     }
     if (this == obj) {