diff --git a/paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java b/paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
index f9ab43049..0bbd2c533 100644
--- a/paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
+++ b/paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftPlayer.java
@@ -698,6 +698,24 @@ public class CraftPlayer extends CraftHumanEntity implements Player {
     }
     // Paper end - Add sendOpLevel API
 
+    // Paper start - custom chat completions API
+    @Override
+    public void addAdditionalChatCompletions(@NotNull Collection<String> completions) {
+        this.getHandle().connection.send(new net.minecraft.network.protocol.game.ClientboundCustomChatCompletionsPacket(
+            net.minecraft.network.protocol.game.ClientboundCustomChatCompletionsPacket.Action.ADD,
+            new ArrayList<>(completions)
+        ));
+    }
+
+    @Override
+    public void removeAdditionalChatCompletions(@NotNull Collection<String> completions) {
+        this.getHandle().connection.send(new net.minecraft.network.protocol.game.ClientboundCustomChatCompletionsPacket(
+            net.minecraft.network.protocol.game.ClientboundCustomChatCompletionsPacket.Action.REMOVE,
+            new ArrayList<>(completions)
+        ));
+    }
+    // Paper end - custom chat completions API
+
     @Override
     public void setCompassTarget(Location loc) {
         Preconditions.checkArgument(loc != null, "Location cannot be null");