--- a/net/minecraft/network/protocol/game/ClientboundSetBorderCenterPacket.java
+++ b/net/minecraft/network/protocol/game/ClientboundSetBorderCenterPacket.java
@@ -10,8 +10,10 @@
     private final double newCenterZ;
 
     public ClientboundSetBorderCenterPacket(WorldBorder worldborder) {
-        this.newCenterX = worldborder.getCenterX();
-        this.newCenterZ = worldborder.getCenterZ();
+        // CraftBukkit start - multiply out nether border
+        this.newCenterX = worldborder.getCenterX() * worldborder.world.getDimensionManager().getCoordinateScale();
+        this.newCenterZ = worldborder.getCenterZ() * worldborder.world.getDimensionManager().getCoordinateScale();
+        // CraftBukkit end
     }
 
     public ClientboundSetBorderCenterPacket(PacketDataSerializer packetdataserializer) {
