diff --git a/paper-server/src/main/java/org/bukkit/craftbukkit/block/CraftSign.java b/paper-server/src/main/java/org/bukkit/craftbukkit/block/CraftSign.java
index ae54e0f49..8e8a1c582 100644
--- a/paper-server/src/main/java/org/bukkit/craftbukkit/block/CraftSign.java
+++ b/paper-server/src/main/java/org/bukkit/craftbukkit/block/CraftSign.java
@@ -35,7 +35,13 @@ public class CraftSign extends CraftBlockState implements Sign {
         boolean result = super.update(force);
 
         if (result) {
-            System.arraycopy(lines, 0, sign.lines, 0, lines.length);
+            for(int i = 0; i < 4; i++) {
+                if(lines[i] != null) {
+                    sign.lines[i] = lines[i];
+                } else {
+                    sign.lines[i] = "";
+                }
+            }
             sign.update();
         }