diff --git a/FightSystem_Core/src/de/steamwar/fightsystem/listener/ClickAnalyzer.java b/FightSystem_Core/src/de/steamwar/fightsystem/listener/ClickAnalyzer.java
index bf0ea32..9aea4b2 100644
--- a/FightSystem_Core/src/de/steamwar/fightsystem/listener/ClickAnalyzer.java
+++ b/FightSystem_Core/src/de/steamwar/fightsystem/listener/ClickAnalyzer.java
@@ -43,7 +43,9 @@ public class ClickAnalyzer {
     }
 
     public Object onBlockPlace(Player player, Object packet) {
-        output.println(player.getName() + "," + System.nanoTime() + "," + CraftbukkitWrapper.impl.headRotation(player) + "," + player.getLocation().getPitch());
+        synchronized(output) {
+            output.println(player.getName() + "," + System.nanoTime() + "," + CraftbukkitWrapper.impl.headRotation(player) + "," + player.getLocation().getPitch());
+        }
         return packet;
     }