diff --git a/htroot/Blacklist_p.java b/htroot/Blacklist_p.java
index e2ab2ada6..622905bfb 100644
--- a/htroot/Blacklist_p.java
+++ b/htroot/Blacklist_p.java
@@ -44,6 +44,7 @@ import de.anomic.data.Blacklist;
 import de.anomic.data.listManager;
 import de.anomic.http.httpRequestHeader;
 import de.anomic.kelondro.util.Log;
+import de.anomic.plasma.plasmaSearchEvent;
 import de.anomic.plasma.plasmaSwitchboard;
 import de.anomic.server.serverObjects;
 import de.anomic.server.serverSwitch;
@@ -64,6 +65,9 @@ public class Blacklist_p {
         listManager.switchboard = (plasmaSwitchboard) env;
         listManager.listsPath = new File(listManager.switchboard.getRootPath(),listManager.switchboard.getConfig("listManager.listsPath", "DATA/LISTS"));
         
+        // clean up all search events in case that a (new) blacklist entry denies previously returned results
+        plasmaSearchEvent.cleanupEvents(true);
+        
         // getting the list of supported blacklist types
         final String supportedBlacklistTypesStr = AbstractBlacklist.BLACKLIST_TYPES_STRING;
         final String[] supportedBlacklistTypes = supportedBlacklistTypesStr.split(",");