diff --git a/build.gradle b/build.gradle
index 406cca1..2835ff5 100644
--- a/build.gradle
+++ b/build.gradle
@@ -27,7 +27,7 @@ sourceSets {
     api {}
 }
 
-version = "1.0.8"
+version = "1.0.9"
 group = "universalelectricity"
 archivesBaseName = "icbm"
 
diff --git a/src/main/java/icbm/zhapin/daodan/EMissile.java b/src/main/java/icbm/zhapin/daodan/EMissile.java
index b09d9c7..a77d14b 100644
--- a/src/main/java/icbm/zhapin/daodan/EMissile.java
+++ b/src/main/java/icbm/zhapin/daodan/EMissile.java
@@ -665,7 +665,9 @@ public class EMissile extends Entity
 
     @Override
     protected void writeEntityToNBT(final NBTTagCompound nbt) {
-        nbt.setTag("kaiShi", this.origin.writeToNBT(new NBTTagCompound()));
+        if (this.origin != null) {
+            nbt.setTag("kaiShi", this.origin.writeToNBT(new NBTTagCompound()));
+        }
 
         if (this.target != null) {
             nbt.setTag("muBiao", this.target.writeToNBT(new NBTTagCompound()));