diff --git a/src/main/java/xyz/zhouxy/plusone/commons/function/ThrowingPredicate.java b/src/main/java/xyz/zhouxy/plusone/commons/function/ThrowingPredicate.java
index 1d1f9d7..b886db6 100644
--- a/src/main/java/xyz/zhouxy/plusone/commons/function/ThrowingPredicate.java
+++ b/src/main/java/xyz/zhouxy/plusone/commons/function/ThrowingPredicate.java
@@ -16,6 +16,7 @@
 
 package xyz.zhouxy.plusone.commons.function;
 
+@FunctionalInterface
 public interface ThrowingPredicate<T, E extends Throwable> {
 
     /**