diff --git a/src/main/java/dan200/computercraft/shared/peripheral/modem/wired/WiredModemLocalPeripheral.java b/src/main/java/dan200/computercraft/shared/peripheral/modem/wired/WiredModemLocalPeripheral.java
index 1d90f0200..d7451df90 100644
--- a/src/main/java/dan200/computercraft/shared/peripheral/modem/wired/WiredModemLocalPeripheral.java
+++ b/src/main/java/dan200/computercraft/shared/peripheral/modem/wired/WiredModemLocalPeripheral.java
@@ -118,7 +118,7 @@ public final class WiredModemLocalPeripheral
 
     public void writeNBT( @Nonnull NBTTagCompound tag, @Nonnull String suffix )
     {
-        if( id >= 0 ) tag.setInteger( NBT_PERIPHERAL_TYPE + suffix, id );
+        if( id >= 0 ) tag.setInteger( NBT_PERIPHERAL_ID + suffix, id );
         if( type != null ) tag.setString( NBT_PERIPHERAL_TYPE + suffix, type );
     }