diff --git a/broker/src/main/java/io/moquette/persistence/MemoryMessagesStore.java b/broker/src/main/java/io/moquette/persistence/MemoryMessagesStore.java
index 30d18978..e7c1cf86 100755
--- a/broker/src/main/java/io/moquette/persistence/MemoryMessagesStore.java
+++ b/broker/src/main/java/io/moquette/persistence/MemoryMessagesStore.java
@@ -2318,6 +2318,7 @@ public class MemoryMessagesStore implements IMessagesStore {
             words) {
             databaseStore.deleteSensitiveWord(word);
         }
+        lastUpdateSensitiveTime = 0;
         return true;
     }