diff --git a/app/src/main/java/org/ntlab/radishforandroidstudio/cactusClient/models/Bullet.java b/app/src/main/java/org/ntlab/radishforandroidstudio/cactusClient/models/Bullet.java
index a67e589..fde346a 100644
--- a/app/src/main/java/org/ntlab/radishforandroidstudio/cactusClient/models/Bullet.java
+++ b/app/src/main/java/org/ntlab/radishforandroidstudio/cactusClient/models/Bullet.java
@@ -32,14 +32,16 @@
 
     public Bullet(Object3D body, Animation3D animation) {
         super(body, animation);
+        initUuid();
     }
 
     public Bullet(Solid3D body, Animation3D animation) {
         super(body, animation);
+        initUuid();
     }
 
     public void initUuid() {
-        if (uuid.equals("")) {
+        if (uuid == null || uuid.equals("")) {
             uuid = UUID.randomUUID().toString();
         }
     }