diff --git a/paper-api/src/main/java/io/papermc/paper/util/EitherRight.java b/paper-api/src/main/java/io/papermc/paper/util/EitherRight.java
index 0b14391b3d..c4082b0b7a 100644
--- a/paper-api/src/main/java/io/papermc/paper/util/EitherRight.java
+++ b/paper-api/src/main/java/io/papermc/paper/util/EitherRight.java
@@ -1,4 +1,9 @@
 package io.papermc.paper.util;
 
+import org.jetbrains.annotations.ApiStatus;
+import org.jspecify.annotations.NullMarked;
+
+@NullMarked
+@ApiStatus.Internal
 public record EitherRight<L, R>(R value) implements Either.Right<L, R> {
 }